Biography of a kangaroo. Kangaroos are the best jumpers on the planet

Kangaroos are the most famous marsupial animals, which personify the entire order of Marsupials in general. Nevertheless, the vast family of kangaroos, numbering about 50 species, stands apart in this order and keeps many secrets.

Red kangaroo ( Macropus rufus).

Externally, kangaroos do not resemble any other animal: their head resembles that of a deer, their neck middle length, the body is slender in the front and widens in the back, the limbs are of different sizes - the front ones are relatively small, and the back ones are very long and powerful, the tail is thick and long. The front paws are five-fingered, have well-developed toes, and look more like a primate hand than a dog's paw. Nevertheless, the fingers end in rather large claws.

The front paw of a large gray or forest kangaroo (Macropus giganteus).

The hind feet have only four toes ( thumb reduced), with the second and third fingers fused. The kangaroo's body is covered with short, thick hair, which protects the animals well from heat and cold. The color of most species is protective - gray, red, brown, some species may have white stripes. The sizes of kangaroos vary widely: the largest red kangaroos reach a height of 1.5 m and weigh up to 85-90 kg, and the smallest species are only 30 cm long and weigh 1-1.5 kg! All types of kangaroos are conventionally divided into three groups by size: the three largest species are called gigantic kangaroos, the medium-sized kangaroos are called wallabies, and the smallest species are called rat kangaroos or kangaroo rats.

The brush-tailed kangaroo (Bettongia lesueur) is a representative of the small rat kangaroos. Due to its tiny size, it can easily be mistaken for a rodent in appearance.

The kangaroo's habitat covers Australia and the adjacent islands - Tasmania, New Guinea, in addition, kangaroos are acclimatized in New Zealand. Among kangaroos, there are both species with a wide range, living throughout the continent, and endemics, found only in a limited area (for example, in New Guinea). The habitat of these animals is very diverse: most species inhabit open forests, grassy and desert plains, but there are also those that live... in the mountains!

Mountain kangaroo, or wallaroo (Macropus robustus) among the rocks.

It turns out that kangaroos among the rocks are a common sight; for example, mountain wallabies can rise to the level of the snow.

A kangaroo in a snowdrift is not such a rare occurrence.

But the most unusual are tree kangaroos, which live in dense forests. They spend most of their lives on tree branches and climb very deftly in the crowns, and at times jump over trunks in short leaps. Considering that their tail and hind legs are not at all tenacious, then such balancing is amazing.

Goodfellow's tree kangaroo (Dendrolagus goodfellowi) with baby.

All types of kangaroos move on their hind legs; while grazing, they hold their body horizontally and can rest their front paws on the ground, while alternately pushing off with their hind and forelimbs. In all other cases, they hold the body in an upright position. Interestingly, kangaroos are not able to move their paws sequentially, as other two-legged animals (birds, primates) do and push off the ground with both paws at the same time. For this reason, they cannot move backwards. Actually walking is unknown to these animals; they move only by jumping, and this is a very energy-consuming method of movement! On the one hand, kangaroos have phenomenal jumping ability and are able to make jumps several times greater than their body length, on the other hand, they spend a lot of energy on such a movement, so they are not very durable. Large species of kangaroo can maintain a good pace for no more than 10 minutes. However, this time is enough to hide from enemies, because the length of the jump of the largest red kangaroo can reach 9 and even 12 m, and the speed is 50 km/h! Red kangaroos can jump up to 2 m in height.

The jumps of the red kangaroo amaze with their power.

Other species have more modest achievements, but in any case, kangaroos are the fastest animals in their habitat. The secret of such jumping ability lies not so much in the powerful muscles of the paws, but in... the tail. The tail serves as a very effective balancer during jumping and as a fulcrum when sitting, leaning on the tail, these animals relieve the muscles of the hind limbs.

Kangaroos often rest lying on their sides in a sybaritic pose, comically scratching their sides.

Kangaroos are herd animals and live in groups of 10-30 individuals, with the exception of the smallest rat kangaroos and mountain wallabies, which live alone. Small species are active only at night, large ones can be active during the day, but still prefer to graze in the dark. There is no clear hierarchy in the kangaroo herd and in general their social connections are not developed. This behavior is due to the general primitiveness of marsupials and the weak development of the cerebral cortex. Their interaction is limited to monitoring their brothers - as soon as one animal gives an alarm signal, the rest take to their heels. The kangaroo's voice is similar to a hoarse cough, but their hearing is very sensitive, so they hear a relatively quiet cry from afar. Kangaroos do not have homes, with the exception of rat kangaroos, which live in burrows.

The yellow-footed rock wallaby (Petrogale xanthopus), also called the ring-tailed or yellow-footed kangaroo, has taken a fancy to the rocks.

Kangaroos feed on plant foods, which they can chew twice, regurgitating part of the digested food and chewing it again, like ruminants. The kangaroo has a stomach complex structure and is populated by bacteria that facilitate the digestion of food. Most species feed exclusively on grass, eating it in large quantities. Tree kangaroos feed on leaves and fruits of trees (including ferns and vines), and the smallest rat kangaroos can specialize in eating fruits, bulbs and even frozen plant sap, and they can also include insects in their diet. This brings them closer to other marsupials - possums. Kangaroos drink little and can go without water for a long time, being content with the moisture of plants.

Female kangaroo with baby in pouch.

Kangaroos do not have a specific breeding season, but their reproductive processes are very intense. In fact, the female’s body is a “factory” for the production of its own kind. Excited males engage in fights, during which they lock their front paws together and hit each other hard in the stomach with their hind paws. In such a fight, the tail plays an important role, on which the fighters literally rely on their fifth leg.

Male great gray kangaroos in a mating match.

Pregnancy in these animals is very short, for example, female gray giant kangaroos carry a baby for only 38-40 days, in small species this period is even shorter. In fact, kangaroos give birth to underdeveloped embryos 1-2 cm long (in the largest species). It is surprising that such a premature fetus has complex instincts that allow it to independently (!) reach the mother’s pouch. The female helps him by licking a path in the fur, but the embryo crawls without outside help! To appreciate the scale of this phenomenon, imagine if human children were born 1-2 months after conception and independently found their mother's breasts blindly. Having climbed into the mother's pouch, the baby kangaroo attaches itself to one of the nipples for a long time and spends the first 1-2 months in the pouch.

Kangaroo is a mammal that belongs to the order Two-incisor marsupials (lat. Diprotodontia), the Kangaroo family (lat. Macropodidae). Among these animals there are many endangered and rare species.

The term "kangaroo" is also applied to the family of Kangaroo rats, or potoroos. Potoroidae), the features of which we will discuss in another article.

Etymology of the word "kangaroo"

Interpretations (etymologies) of words can be scientific and folk, and very often they do not coincide. The case of the origin of the name kangaroo is one of the most typical such examples. Both interpretations agree that this word comes from the language of the Aboriginal people of Australia. When Captain Cook sailed to the mainland, he saw strange animals and asked the natives what these unusual animals were called. The aborigines answered: “gangaru.” Some scientists believe that in the native language “keng” (or “gang”) meant “jump”, and “roo” meant “four-legged”. Other researchers translate the locals' response as "I don't understand."

Linguists are confident that the word “kanguroo” or “gangurru” appeared in the language of the Australian Guugu-Yimithirr tribe, which lived on the coast of the Botanical Bay of the Tasman Sea. This word was used by local residents to call black and gray kangaroos. When Cook's expedition arrived on the mainland, all representatives of the kangaroo family began to be called this way. Literally, kangaroo is translated as “big jumper”, as opposed to the “little jumper”, which the Aborigines called “waloru”. This word has now changed to "wallaby" and is present in the species name of the mountain kangaroo. It also became a collective name for all medium-sized representatives of the kangaroo family.

What does a kangaroo look like? Description and characteristics of the animal

In a broad sense, the term “kangaroo” is used in relation to the entire Kangaroo family, and in a narrow sense it is used only in relation to large, real, or gigantic representatives of this taxon, the foot of whose hind legs is longer than 25 cm. Smaller animals are more often called wallaroo and wallaby. The common name “giant kangaroos” can equally be applied to both real kangaroos and wallaroos, since they are also tall.

The Kangaroo family includes 11 genera and 62 species included in them. Maximum length recorded in the eastern gray kangaroo (lat. Macropus giganteus): it is 3 meters. In second place is the gigantic red kangaroo (lat. Macropus rufus) with a body size excluding the tail of up to 1.65 m. True, the gigantic red one loses in weight. Its maximum weight is 85 kg, with the eastern gray kangaroo weighing 95 kg.

On the left is an eastern gray kangaroo (lat. Macropus giganteus), photo credit: Benjamint444, CC BY-SA 3.0. On the right is a gigantic red kangaroo (lat. Macropus rufus), photo by: Drs, Public Domain

The smallest representatives of the Kangaroo family are the Philanders, the striped hare-wallaby and the short-tailed kangaroo (quokka). For example, the body length of a mini-kangaroo, red-necked philander (lat. Thylogale thetis), reaches only 29-63 cm. At the same time, the animal’s tail grows to 27-51 cm. Average weight females are 3.8 kg, males – 7 kg.

Quokkas (lat. Setonix brachyurus) have overall body dimensions with a tail from 65 cm to 1.2 m. Their weight is less: females weigh from 1.6 kg, and the weight of males does not exceed 4.2 kg. The length of the body of the striped wallaby hare (lat. Lagostrophus fasciatus) is 40-45 cm, the tail length is 35-40 cm, and the mammal weighs from 1.3 to 2.1 kg.

Sign: On the left is the red-necked philander (lat. Thylogale thetis), photo author: Gaz, CC BY-SA 3.0. In the center is a quokka (lat. Setonix brachyurus), photo credit: SeanMack, CC BY-SA 3.0. On the right is a striped wallaby (Lagostrophus fasciatus), photo by John Gould, Public Domain.

Typically, male kangaroos are much larger in size than females. The growth of females stops soon after the start of reproduction, but males continue to grow, as a result of which old individuals are much larger than young ones. A female gray or red kangaroo weighing 15–20 kg, participating in reproduction for the first time, can be courted by a male who is 5–6 times larger than her. Sexual dimorphism is most pronounced in large species. In contrast, in small wallabies, adults of different sexes have similar sizes.

Large kangaroos are very interesting animals, which is difficult not to recognize. Their heads are small, with big ears and large almond-shaped eyes. The eyes are framed by long, dense eyelashes that reliably protect the cornea from dust. The animals' noses are black and bare.

The lower jaw of a kangaroo has a peculiar structure, its rear ends are bent inward. In total, the animals have 32 or 34 teeth, which do not have roots and are adapted to feeding on rough plant foods:

• one wide, forward-facing incisor on each half of the lower jaw;
• small blunt fangs, reduced in some species;
• 4 pairs of molars, replaced as they wear out and equipped with blunt cusps. When the last teeth wear out, the animal begins to starve.

The kangaroo's neck is thin, the chest is narrow, the front legs seem to be underdeveloped, while the jumping legs are very strong and massive.

The kangaroo's tail, thick at the base and tapering towards the end, serves as a balancer when jumping, and in large individuals it serves as a support for the body during fights and sitting. It does not perform a grasping function. The length of a kangaroo's tail varies from 14.2 to 107 cm, depending on the species. The tail of the Philanderer is shorter and thicker, and also less furry than that of the wallaby.

Muscular thighs support the narrow pelvis of mammals. On the even longer bones of the lower leg, the muscles are not so developed, and the ankles are designed in such a way that they prevent the foot from turning to the side. During rest or slow movement, the animal's body weight is distributed over long narrow feet, creating the effect of plantigrade walking. However, when jumping, the kangaroo rests on only two toes - the 4th and 5th. The second and third fingers were reduced and turned into a single process with two claws used for cleaning fur. The first toe is completely lost.

As a result of the evolution of the rock wallaby, the soles of its hind legs are covered with thick hair, which helps the animal stay on slippery, wet or grassy surfaces. Their body became massive, covered with coarse, thick hair.

Philanders and tree-wallabies are somewhat different from other kangaroos. Their hind legs are not large, like those of other kangaroos.

Left: Tasmanian pademelon, photo by fir0002, GFDL 1.2; right: Goodfellow's kangaroo (lat. Dendrolagus goodfellowi), photo credit: Richard Ashurst, CC BY 2.0

Latin name of the family Macropodidae received according to gender Macrop us, which includes the red kangaroo. From Latin this word is translated as “big-legged”. The term is quite appropriate for the largest mammal, moving by jumping on powerful hind legs. But this is not the only way of movement for representatives of the Kangaroo family. These mammals not only jump: they can also walk slowly on all fours, which move in pairs rather than alternately.

When large and medium-sized animals raise their hind legs to carry them forward, they rely on their tail and front paws. When jumping, kangaroos can reach speeds of 40-60 km/h, but over short distances. Since their method of movement is very energy-consuming, they get tired and slow down just 10 minutes after they start jumping quickly.

When resting, they sit on their hind legs, holding their body upright and leaning on their tail, or lie on their side. Animals lying on their sides rest on their forelimbs.

When large kangaroos escape from enemies, they make jumps 10-12 m long. They also jump over fences 3 meters high and “fly over” four-lane highways. They are helped by the Achilles tendons of the legs, which act like springs. At an average “running” speed (20 km/h), the kangaroo jumps a distance of 2-3 m.

Kangaroos are excellent swimmers, and they often escape from enemies in the water. At the same time, their legs make alternating, rather than paired movements.

The front paws of large kangaroos are small, with five movable toes on a short and wide hand. The fingers end in strong, sharp claws: animals actively work with them, take food, comb fur, grab enemies during defense, open the bag, dig wells, burrows and underground parts of plants. Large species also use the forelimbs for thermoregulation, licking their inner side: saliva, evaporating, cools the blood in the network of superficial vessels of the skin.

Soft, short (2-3 cm long), not shiny, thick kangaroo fur has a protective color. It comes in different shades of grey, yellow, black, brown or red. Many species have diffuse dark or light stripes: along the lower back, around the upper thigh, in the shoulder area, behind or between the eyes. The limbs and tail are often darker than the body, and the belly is usually light. Some rock and tree kangaroos have longitudinal or transverse stripes on their tails.

The males of some groups are brighter colored than the females: for example, the males of the red kangaroo are sandy-red in color, while the females are blue-gray or sandy gray. But this dimorphism is not absolute: some males can be blue-gray, and females red. Hair color in each sex appears immediately after birth and is not a result of hormonal changes during puberty, as in many ungulates.

There are albino kangaroos with white fur.

Although marsupial bones are developed in both males and females, only the belly of the females of all kangaroos is equipped with a pouch that opens forward. It is needed to carry helpless newborn babies to term. At the top of the pouch there are muscles with which the female closes it tightly if necessary: ​​for example, so that the baby kangaroo does not choke while the mother is in the water.

How long do kangaroos live?

The average life expectancy of kangaroos in natural conditions is 4-6 years. Large species in nature can live 12-18 years, in captivity - 28 years.

What does a kangaroo eat?

Basically, kangaroos are herbivores. But among them there are also omnivorous species. Large red kangaroos feed on dry, tough and often thorny grass (for example, triodia (lat. Triodia)). Short-faced kangaroos eat mainly underground storage parts of plants: thickened roots, rhizomes, tubers and bulbs. They also eat the bodies of some fungi, playing an important role in the spread of their spores. Small wallabies, including hares and claw-tails, feed on grass leaves, seeds and fruits.

In moderately humid forests, the diet of kangaroos includes more fruits and leaves of dicotyledonous plants, which dominate the diet of tree kangaroos, swamp wallabies and philanders. Woody species may also eat eggs and chicks, cereals, and even tree bark.

Different types of kangaroos eat alfalfa (lat. Medicago), clover (lat. Trifolium), ferns (lat. Polypodiophyta), eucalyptus leaves (lat. . Eucalyptus) and acacias (lat. Acacia), cereals and other plants. Red-legged Philanders enjoy eating the fruits of trees such as Ficusmacrophylla And Pleiogynium timorense, sometimes eat the leaves of ferns from the genus Nephrolepis (lat. Nephrolepis cordifolia), dendrobium orchids (lat. Dendrobium speciosum), nibble grass ( Paspalum notatum And Cyrtococcum oxyphyllum), periodically catch cicadas. Diet of the glove wallaby (lat. Macropus irma) includes plants such as carpobrotus edulis (lat. Carpobrotus edulis), pigweed (lat. Cynodon dactylon), Nuitsia profusely flowering (Christmas tree) ( lat . Nuytsia floribunda).

The smallest kangaroos are the most selective in their food preferences. They seek out high-quality foods, many of which require careful digestion. Large species, on the contrary, tolerate low-quality nutrition, consuming a wide range of plant species.

Kangaroos graze at different times of the day, depending on the weather. In the heat, they can lie in the shade all day, and at dusk they set off. These animals are very undemanding to water: they can not drink for a month or even more (up to 2-3 months), being content with the moisture of plants or licking dew from stones and grass. Wallaroo strip the bark from trees to drink their sap. In dry places, large kangaroos have learned to get to the water themselves. When they are thirsty, they dig wells up to a meter deep with their paws. These watering holes are used by many other animals: pink cockatoos (lat. Eolophus roseicapilla), marsupial martens (lat. Dasyurus), wild, etc.

The kangaroo's stomach is adapted to digesting rough plant foods. It is disproportionately large, complex, but not multi-chambered. Some Kangaroos regurgitate semi-digested gruel from the stomach and chew it again, as do ungulate ruminants. They are helped in breaking down fiber by up to 40 species of bacteria that live in different parts of their gastrointestinal tract. The role of fermentation agent in them is also performed by massively reproducing symbiotic yeast fungi.

At the zoo, kangaroos are fed herbs; the basis of their diet is rolled oats mixed with seeds, nuts, dried fruits and wheat crackers. The animals happily eat vegetables, corn and fruits.

Kangaroo classification

According to the database www.catalogueoflife.org, the Kangaroo family (lat. Macropodidae) includes 11 genera and 62 modern species (data from 04/28/2018):

• Genus Tree kangaroos (lat. Dendrolagus)
  • Dendrolagus bennettianus– Bennett's Kangaroo
  • Dendrolagus dorianus– Kangaroo Doria
  • Dendrolagus goodfellowi– Kangaroo Goodfellow
  • Dendrolagus inustus– Grey-haired tree kangaroo
  • Dendrolagus lumholtzi– Lumholtz's Kangaroo (Lumholtz)
  • Dendrolagus matschiei– Kangaroo Matches (Matshi)
  • Dendrolagus mbaiso– Tree wallaby, dingiso, bondegezoo
  • Dendrolagus pulcherrimus
  • Dendrolagus scottae– Papuan tree kangaroo
  • Dendrolagus spadix– Plains tree kangaroo
  • Dendrolagus stellarum
  • Dendrolagus ursinus– Bear kangaroo, bear-shaped kangaroo
• Genus Shrub kangaroos (lat. Dorcopsis)
  • Dorcopsis atrata– Black bush kangaroo, Goodenough kangaroo
  • Dorcopsis hageni– Hagen Kangaroo
  • Dorcopsis luctuosa
  • Dorcopsis muelleri
• Genus Forest kangaroos (lat. Dorcopsulus)
  • Dorcopsulus macleayi– Macleay's Kangaroo
  • Dorcopsulus vanheurni– Mountain bush kangaroo
• Genus Hare kangaroo (lat. Lagorchestes)
  • Lagorchestes asomatus– Small rabbit kangaroo
  • Lagorchestes conspicillatus– Spectacled kangaroo
  • Lagorchestes hirsutus– Shaggy kangaroo, tufted kangaroo
  • † Lagorchestes leporides– Long-eared kangaroo
• Genus Striped kangaroo (lat. Lagostrophus)
  • Lagostrophus fasciatus– Striped kangaroo, striped wallaby hare
• Genus Gigantic kangaroos (lat. Macropus)
  • Macropus fuliginosus– Western gray kangaroo
  • Macropus giganteus– Giant kangaroo, or giant gray kangaroo
  • Macropus (Notamacropus) agilis– Agile wallaby, agile kangaroo
  • Macropus (Notamacropus) dorsalis– Black-striped wallaby
  • Macropus (Notamacropus) eugenii– Eugenia Kangaroo, Eugenia Philander, Lady Kangaroo, Derby Kangaroo, Tamnar
  • Macropus (Notamacropus) irma– Glove Wallaby
  • Macropus (Notamacropus) parma– White-breasted philander, or white-breasted wallaby
  • Macropus (Notamacropus) parryi– Wallaby Parry
  • Macropus (Notamacropus) rufogriseus– Red-gray wallaby
  • Macropus (Osphranter) antilopinus– Antelope kangaroo, antelope kangaroo
  • Macropus (Osphranter) bernardus– Black wallaroo, aka Bernard's kangaroo
  • Macropus (Osphranter) robustus– Mountain kangaroo, mountain wallaroo, common wallaroo
  • Macropus (Osphranter) rufus– Red kangaroo, big red kangaroo, giant red kangaroo
  • † Macropus (Notamacropus) grayi– Gray's Kangaroo
• Genus Claw-tailed kangaroos, also known as nail-tailed kangaroos (lat. Onychogalea)
  • Onychogalea fraenata– Short-clawed kangaroo, bridle kangaroo, or dwarf kangaroo
  • Onychogalea unguifera– Flat-clawed kangaroo
  • †Onychogalea lunata– Lunar-clawed kangaroo, crescent-clawed kangaroo
• Genus Rock wallabies, rock kangaroos, rock kangaroos (lat. Petrogale)
  • Petrogale assimilis– Queensland rock wallaby
  • Petrogale brachyotis– Short-eared kangaroo, or short-eared wallaby
  • Petrogale burbidgei– Wallaby Barbage
  • Petrogale coenensis
  • Petrogale concinna– Pygmy rock wallaby
  • Petrogale godmani– Godman's Wallaby, Godman's Kangaroo
  • Petrogale herberti
  • Petrogale inornata– Spectacled rock wallaby
  • Petrogale lateralis– Black-footed rock wallaby
  • Petrogale mareeba
  • Petrogale penicillata– Brush-tailed rock-wallaby, brush-tailed rock-kangaroo, brush-tailed rock-wallaby
  • Petrogale persephone– Persephone's wallaby
  • Petrogale purpureicollis– Purple-necked wallaby
  • Petrogale rothschildi– Rothschild's wallaby, Rothschild's kangaroo
  • Petrogale sharmani
  • Petrogale xanthopus– Ring-tailed kangaroo, yellow-footed kangaroo, yellow-footed rock wallaby
• Genus Short-tailed kangaroos (lat. Setonix)
  • Setonix brachyurus– Quokka, short-tailed kangaroo
• Philander family (lat. Thylogale)
  • Thylogale billardierii– Tasmanian philander, red-bellied philander
  • Thylogale browni– Philander Brown
  • Thylogale brunii– New Guinea Philander
  • Thylogale calabyi Philander Calabi
  • Thylogale lanatus Mountain Philander
  • Thylogale stigmatica– Red-footed philander
  • Thylogale thetis– Red-necked philander
• Genus Wallaby (lat. Wallabia)
  • Wallabia bicolor– Swamp wallaby
  • † Wallabia indra
  • † Wallabia kitcheneris
• † Genus Watutia
  • † Watutia novaeguineae
• † Genus Dorcopsoides(Dorcopsoides)
  • † Dorcopsoides fossilis
• † Genus Kurrabi
  • † Kurrabi mahoneyi
  • † Kurrabi merriwaensis
  • † Kurrabi pelchenorum
• † Genus Procoptodon (lat. Procoptodon)

In what country do kangaroos live and on what continent are they found?

The habitat of modern kangaroos covers Australia, New Guinea and nearby small islands. Feral populations of some species are found in Great Britain, Germany, Hawaii and New Zealand. Several kangaroos escaped from zoos in the United States and France and founded their own colonies. And yet, according to German geneticists, the homeland of kangaroos is South America, and their history begins from there. These animals are not found in Africa, America and Antarctica.

So, kangaroos live:

• In Australia;
• In New Guinea;
• In Hawaii, the brush-tailed rock wallaby (lat. Petrogale penicillata);
• In England and Germany there is a red-gray wallaby (lat. Macropus rufogriseus);
• The brush-tailed rock kangaroo (lat. Petrogale penicillata), red-gray kangaroo (lat. Macropus rufogriseus), white-breasted wallaby (lat. Macropus parma) and kangaroo Eugenia (lat. Macropus eugenii);
• On the island of Kawau lives the white-breasted wallaby (lat. Macropus parma);
• The red-gray kangaroo (lat. Macropus rufogriseus) and Tasmanian philander (lat. Thylogale billardierii);
• On Kangaroo Island there are western gray kangaroos (lat. Macropus fuliginosus) and Tasmanian kangaroo (lat. Thylogale billardierii);
• The quokka (lat. Setonix brachyurus).

Representatives of the genus Macropus are found in various natural areas: ranging from deserts to the edges of moist eucalyptus forests. Short-faced kangaroos are inhabitants of sparse forests, copses and grassy savannas. The distribution of representatives of the genera of bush, tree and forest kangaroos is limited to rain forests. Philanders also inhabit moist, dense forests, including eucalyptus. By the way, tree kangaroos are the only members of the family that live in trees. Hare and claw-tailed kangaroos live in deserts and semi-deserts, including bushland, savannas and sparse woodlands. Rock wallabies occupy territories that range from the desert zone of Central, Western and South Australia to tropical forests. They live among boulder rubble, rock outcrops and cliffs, where they hide during the day.

Kangaroo breeding

Some kangaroos breed seasonally, but most mate and give birth at any time of the year. On the day of estrus, the female may be accompanied by a string of passionate males, waging endless duels for the opportunity to leave offspring.

Kangaroos fight brutally, as if in a fight without rules. Leaning on their tails, they stand on their hind legs and, like wrestlers, clasp each other with their forelimbs. To win, you need to knock your opponent to the ground and beat him with his hind legs. Sometimes kangaroo fights end in severe injuries.

Males of many species of large kangaroos leave scent marks. They mark grass, bushes and trees with secretions from their throat glands. They leave the same “traces” on the female’s body during the courtship period, showing rivals that this is his chosen one. A specific secretion in males is also produced in the cloaca, which passes through the ducts into urine or feces.

Females of large kangaroos begin to reproduce at 2-3 years, when they grow to half the length of an adult animal, and remain reproductively active until 8-12 years. Male kangaroos reach sexual maturity soon after females, but in larger species they are not allowed to breed by adult males. The hierarchical position of kangaroos is determined by their overall size, and, consequently, age. In gray kangaroos, the dominant male in a given area can perform up to half of all matings in his area. But he can maintain his special status only for a year, and to achieve it he must live 8–10 years. Most males never mate at all, and very few reach the top of the hierarchy.

On average, the gestation period for kangaroos lasts 4 weeks. More often they give birth to only one cub, less often two, large red kangaroos (lat. Macropus rufus) bring up to 3 kangaroos. Kangaroos are mammals that do not have a placenta. Due to its absence, embryos develop in yolk sac The uterus is female, and kangaroo cubs are born underdeveloped and tiny, only 15-25 mm long and weighing from 0.36 - 0.4 grams (for quokkas and philanders) to 30 grams (for gray kangaroos). In fact, these are still embryos, similar to mucous lumps. They are so small that they can fit in a tablespoon. At birth, a baby kangaroo does not have formed eyes, hind limbs and tail. The birth of such small cubs does not require much effort from the female; she sits on the rump, extending her tail between her hind limbs, and licks the fur between the cloaca and the pouch. Kangaroos give birth very quickly.

This is what a newborn kangaroo looks like, having already crawled into the pouch and sucked on its mother’s nipple. Photo credit: Geoff Shaw, CC BY-SA 3.0

Using strong forelimbs, a newly born calf, without outside help, guided by the smell of milk, climbs up the mother’s fur into her pouch in an average of 3 minutes. There, a small kangaroo attaches itself to one of the 4 nipples and continues to develop for 150-320 days (depending on the species), remaining attached to it.

The newborn itself is not able to suck milk at first: it is fed by the mother, regulating the flow of fluid with the help of muscles. Helps your baby avoid choking special structure larynx. If during this period the baby kangaroo accidentally breaks away from the nipple, it may die of starvation. The bag serves as a cuvette chamber in which its development is completed. It provides the newborn with the necessary temperature and humidity.

When a small kangaroo leaves the nipple, in many large species the mother allows him to leave the pouch for short walks, returning it back when moving. She forbids him to enter the pouch only before the birth of a new cub, but he continues to follow her and can stick his head into the pouch to suckle.

The amount of milk changes as the baby grows. The mother simultaneously feeds the baby kangaroo in the pouch and the previous one, but with different amounts of milk and from different nipples. This is possible due to the fact that skin secretion in each mammary gland is independently regulated by hormones.

A few days after giving birth, the female is ready to mate again. If she becomes pregnant, the embryo stops developing. This diapause lasts about a month until the baby in the pouch leaves it. Then the embryo continues its development.

Two days before giving birth, the mother does not allow the previous kangaroo to get into the pouch. The baby perceives this rebuff with difficulty, since he was previously taught to return at the first call. Meanwhile, the female kangaroo cleans and prepares her pocket for the next baby. During the dry season, the embryo remains in a state of diapause until the rainy season arrives.

Lifestyle of a kangaroo in the wild

Surely everyone knows the redhead Australian kangaroo, which gallops through the desert regions of the mainland. But this is only one of 62 species of kangaroos. Desert-adapted herbivores, such as the red kangaroo, appeared 5-15 million years ago. Before this, Australia was covered with forests, and the ancestors of the representatives of this amazing family lived in trees.

Most kangaroos are solitary animals, with the exception of females with cubs that form a family. Brush-tailed kangaroos make shelters in burrows that they dig on their own, and settle there in small colonies. And yet these animals cannot be called truly social. Solitary kangaroo subfamily Macropodinae that do not use permanent shelters (mainly small species living in areas with dense vegetation) behave in the same way, but the union between the female and her last offspring can last many weeks after the cessation of milk feeding. Rock kangaroos take refuge during the day in crevices or piles of stones, forming colonies. At the same time, males try to prevent other suitors from entering the shelter of their females. In some species of rock kangaroos, males team up with one or more females, but they do not always feed together. Male tree kangaroos guard trees used by one or more females.

Large species of kangaroo live in herds. Some of them form groups of 50 or more individuals. Membership in such a group is free, and animals can leave and rejoin it repeatedly. Individuals of certain age categories usually tend to live nearby. The characteristics of a female’s socialization are determined by the stage of development of her kangaroo: females whose babies are ready to leave the pouch avoid meeting other females in the same position. Males move from one group to another more often than females and use larger habitat areas. They are not territorial and move widely, checking a large number of female individuals.

Large social kangaroos live in open areas and used to be attacked by land and aerial predators such as dingoes, wedge-tailed eagle or the now extinct marsupial wolf. Living in a group gives kangaroos the same benefits as many other social animals. Thus, dingoes have fewer opportunities to approach a large group, and kangaroos can spend more time feeding.

Kangaroo and man

At favorable conditions Kangaroos breed very quickly, which greatly worries Australian farmers. In Australia, from 2 to 4 million large kangaroos and wallaroos are killed annually, as they are considered pests of pastures and crops. Shooting is licensed and regulated. When kangaroo country was settled by the first Europeans, these marsupial mammals were less numerous, and from 1850 to 1900 many scientists feared they might become extinct. The development of pastures and watering holes for sheep and cattle, together with a decrease in the number of dingoes, led to the flourishing of kangaroos.

These animals were once the prey of the aborigines, who hunted mammals with spears and boomerangs. Small wallabies were driven out by fire or driven into prepared traps. In New Guinea they were pursued with bows and arrows, and now they are being killed with firearms. In many areas, hunting has reduced populations and pushed tree kangaroos and other restricted species to the brink of extinction. In most of Australia, outside rain or wet hardwood forests, the number of kangaroo species weighing less than 5–6 kg declined in the 19th century. On the mainland, some of these species have disappeared or have had their range greatly reduced, although they have managed to survive on the islands. The extinction was caused by habitat destruction and the importation of livestock and foxes. Foxes, introduced for sport hunting into the state of Victoria in 1860 - 1880, quickly spread throughout the sheep-raising areas, feeding mainly on introduced animals, but they also began to use short-faced kangaroos and wallabies as prey. Only where foxes have now been eliminated are kangaroos at the peak of population development and have restored their numbers.

Kangaroo- jumping animals with a bag on their stomach. They are found only in distant Australia.

When the navigator Cook set foot on the Australian shores, he saw strange animals. They were as tall as him, and they jumped like grasshoppers. Cook asked who it was, and the local Aborigines said the word “kangaroo.” Cook and his comrades decided that this was the name of the animals. Then it turned out that this word meant: “I don’t understand.” But it was too late, all over the world they got used to calling it that way marsupial mammal. Australians are proud that it lives only in their country, and even put its image on their flag.

Appearance and features

This animal is distinguished by the fact that it has very powerful hind legs and a long tail. When a kangaroo sits, it rests comfortably on its tail, and when jumping, it pushes off with it, like another leg. He can jump very far and high, sometimes 10 meters. The kangaroo's front paws are used mainly for eating. But not only. Sharp claws on the paws can protect against offenders. The most interesting feature of this animal is the bag in which the mother carries her babies. The inside of the bag is smooth, and the edges are covered with fur so that the cub does not freeze. Males do not have such a pouch.

Nutrition

Marsupial mammals are not predators at all. They eat grass and sometimes eat fruit. But without water, they can live for a very long time, just like camels.

The arrival of the baby

Mother kangaroos have babies every year. As soon as they are born, they climb into the pouch themselves and live there for 8 months, feeding on their mother’s milk. After all, it is born little cub completely naked. And its size is no larger than a peanut. It takes a lot of strength to grow and become as tall as an adult man. Mom protects her son or daughter, cleans and closes the bag when it’s cold or raining. If there are kangaroos of different ages in the bag, there will be separate milk for each of them. Various fat contents, just like in the store.

Types of kangaroos and places where they live

We all know the red kangaroo, but in fact there are more than 50 species of these marsupials. They can be huge, twice as tall as a person, and very small, about the size of our hare. And the colors of all species are different, gray, red, and even red. They live in steppes, mountains, deserts, and some species even live in trees.

Friends and enemies

Usually these animals live in packs, with one leader and several females. Predators are afraid of them and do not attack. But sand flies are very harmful. They fly into the eyes of animals and can even blind them.

Where they are fed and shown to all visitors. And they are friendly towards tourists, and even allow themselves to be photographed. Interestingly, there are more kangaroos in Australia than people.

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There are probably not enough words to describe all the diversity of the animal world of our planet. Almost every country and every region has its own unique endemic animals, which are found only in a specific area. A striking example of such creatures is the kangaroo.

And if you ask any person the question “where do kangaroos live”, he will answer without a doubt: in Australia. Of course, he will be right, because a significant part of kangaroos live on this continent, and handsome marsupial is also national symbol the most unique and little-studied state.

However, if you dig deeper, the kangaroo animal can live:

• in New Zealand;
• in New Guinea;
• on the islands of the Bismarck Archipelago;
• in Tasmania.

It should be noted that in nature there are more than 50 varieties of such animals with their own characteristics and interesting facts. Meet giant specimens of red and gray , there are also small kangaroo rats, which also belong to marsupials, there are also wallabies - medium-sized individuals and many others.

Where do kangaroos live: description of the animal and way of life

Main characteristics

The kangaroo belongs to the infraclass marsupials and is a fairly large animal with a height of 100-170 centimeters and a weight of 20-40 kilograms. Such characteristics define males, because females are slightly smaller and lighter. The main feature of the animals is a light gray or reddish-red coat color, a bare black nose and long ears, which allow them to successfully detect the slightest sounds and determine the approach of an enemy.

The animal also has long hind legs and a flexible tail, which allows it to maintain balance when making complex and long jumps. While moving, the animal can develop incredible speeds, which often reach 60 kilometers per hour. If a kangaroo notices danger, it can accelerate up to 90 kilometers per hour. Naturally, he can only run at this speed for a few minutes. The front legs are significantly shorter than the hind legs and have sharp claws. The animal uses its claws to protect itself from predators and to search for water in dry soil. Also, claws serve as an indispensable tool when sorting out relationships with each other.

How long do they live?

The lifespan of a kangaroo often reaches 18 years. Puberty ends at the age of two, and the mating procedure can last a whole year. The pregnant female carries the baby for 32 days, after which a small kangaroo is born. Locals call it joey. The baby is born completely blind and without fur. Moreover, its dimensions are incredibly tiny - 2.5 centimeters. In the first days after birth, the tiny creature climbs into the mother’s pouch and continues to stay there for up to six months. When he is six months old, he begins to take his first independent steps, after which he still returns to the pouch.

The child is finally released at the age of nine months. It should be taken into account that only females have a pouch, because it contains nipples for feeding the offspring with milk.

When feeding the animal can produce several types of milk at once. This is due to the fact that the female can become pregnant again, even if there is already a small cub in the pouch. As a result, several babies of different ages can often be in the bag of such an animal at the same time. The kangaroo determines the size of its pouch independently, depending on the size and number of cubs. When the joey begins to grow, mom expands the bag, and when she is about to go on a long journey, she tightens it so that it does not jump out while moving.

Where do kangaroos live and what do they eat?

Kangaroos can live in four main regions:

1. Australia;
2. New Zealand;
3. New Guinea;
4. Tasmania;

They can be found less frequently on the territory of the Bismarck Archipelago.

In most cases, kangaroos are found in the rocky part of Australia, where they feel protected. The animal is considered social, so it leads a gregarious lifestyle in families of a male and several females. Upon reaching sexual maturity, the animal leaves its family and begins to create its own. The kangaroo's diet consists exclusively of plant food. If an intense drought occurs in a region, the animal begins to dig holes with its claws. Sometimes the depressions reach a meter in depth. In addition, kangaroos are able to extract liquid from food.

Lifestyle Features

As for the lifestyle, these marsupials are almost nocturnal. At dusk, animals go out to pasture and feed on lush grass. It is very difficult to live in Australia during the daytime, which associated with unbearable temperatures air and the scorching sun, so the kangaroo hides in the shade of the trees.

If a kangaroo notices danger or the approach of predators, it will immediately begin to beat its legs on the ground, notifying its neighbors of a possible threat. For centuries, the animal could live peacefully on the continent and not be afraid of attacks from predators. But when the first European colonialists appeared in Australia, the situation changed significantly.

It is known that it was they who brought dingoes to this continent, which went wild and became the main enemies of marsupials. If the kangaroo is in danger, it begins to drive the dog to the nearest body of water and is going to drown him. If there is no access to a body of water, the animal can run to the nearest tree and kick with its hind legs attack a predator. But dingoes are not the only problem for these animals. Australia is home to an incalculable number of dangerous midges that clog the eyes and cause inflammation that can deprive an animal of its sight.

The kangaroo gets along well with people and is practically not afraid of contact with them. Currently, the animal can be found in an ordinary city park or in the forest. If you manage to meet a kangaroo in wildlife, perhaps he will allow you to take a photo with him and feed him by hand.

By the way, near the Australian continent there is one unique island, which is called “kangaroo island”. The fact is that there are a lot of these animals there, and they are presented in their original form. People have little developed the territory, so the number of marsupials is reaching a record high.

There are a huge number of different animals on our planet, but, perhaps, without kangaroos, life on earth would be less interesting. Kangaroo – marsupial and its genus contains more than fifty species.

Kangaroos inhabit many dry areas of the earth. There are a lot of them in New Guinea, they settled on the Bismarck Islands, they can be found in Germany and even in good old England. By the way, these animals have long adapted to life in countries where winter is quite cold, and snowdrifts sometimes reach the waist.

Kangaroo– unofficial symbol Australia and their image, paired with the Emu ostrich, is included in the coat of arms of this continent. They were probably put on the coat of arms due to the fact that these representatives of the fauna can only move forward and it is not in their rules to move back.

In general, it is impossible for a kangaroo to move backwards, because it is hampered by a long, thick tail and massive hind legs, the shape of which is very unusual. Huge, strong hind limbs enable kangaroos to jump at distances that no other animal species existing on earth can reach.

So, a kangaroo jumps three meters in height, and its jump reaches 12.0 m in length. And it should be noted that these animals can develop a very decent speed - 50-60 km/h, which is the permitted speed of a passenger car within the boundaries of cities. The role of a certain balance in an animal is played by the tail, which helps to maintain balance in any situation.

Kangaroo animal has an interesting body structure. The head, somewhat reminiscent in appearance of a deer, is extremely small in size when compared with the body.

The shoulder part is narrow, the front legs are short, covered with hair, poorly developed and have five fingers, at the ends of which there are sharp claws. Moreover, the fingers are very mobile. With them, the kangaroo can grab and hold whatever it decides to use for lunch, and also do its “hair” - the kangaroo combs its fur with the help of its long front fingers.

The body in the lower part of the animal is much better developed than top part torso. The thigh, hind legs, tail - all elements are massive and powerful. The hind limbs have four toes, but interestingly, the second and third toes are united by a membrane, and the fourth ends with a tenacious, strong claw.

The entire body of a kangaroo is covered with thick, short hair, which protects the animal from the heat and keeps it warm in cold weather. The coloring is not too bright and there are only a few colors - sometimes gray with an ashy tint, brown-brown and muted red.

The size range is varied. In nature there are individuals large size, their weight reaches one hundred kilograms with a height of one and a half meters. But also in nature there are species of kangaroos that are the size of a large rat and this, for example, is characteristic of kangaroos from the rat family, although they are more often called kangaroo rats. At all, kangaroo world As animals it is very diverse, there are even marsupials that live in trees - tree kangaroos.

Pictured is a tree kangaroo

Regardless of the species, kangaroos can move only using their hind limbs. While on the pasture, when the kangaroo eats plant food, the animal holds its body in a position almost parallel to the ground - horizontally. And when the kangaroo does not eat, the body takes a vertical position.

It should be noted that moving lower limbs consistently, as many species of animals usually do, the kangaroo cannot. They move by jumping, pushing off simultaneously with both hind legs.

It was already mentioned earlier that it is for this reason that a kangaroo cannot move backward - only forward. Jumping is a difficult and very expensive activity in terms of energy consumption.

If a kangaroo takes a good pace, it will not be able to withstand it for more than 10 minutes and will become exhausted. Although, this time will be quite enough to escape, or rather, gallop away from the enemy.

Experts who study kangaroos say that the secret of the animal’s incredible jumping ability lies not only in its powerful, massive hind legs, but also, imagine, in its tail, which, as was said earlier, is a kind of balancer.

And when sitting, this is an excellent support and, among other things, when kangaroos sit leaning on their tail, they thus allow the muscles of the hind legs to relax.

Character and lifestyle of a kangaroo

To understand more deeply what a kangaroo animal, then it is better to go to Australia or visit a zoo that has these creatures. Kangaroos are considered animals that lead a herd lifestyle.

They mostly gather in groups, the number of which can sometimes reach up to 25 individuals. True, rat kangaroos, as well as mountain kangaroos, are relatives of the kangaroo family by nature, solitary and they do not tend to lead a group lifestyle.

Small-sized species prefer to be active at night, but large species can be active both at night and during the day. However, kangaroos usually graze under the moonlight when the heat subsides.

No one occupies a leading position in a herd of marsupials. There are no leaders due to the primitiveness of animals and underdeveloped brains. Although the instinct of self-preservation in kangaroos is well developed.

As soon as one relative gives a signal about the approaching danger, the entire herd will rush in all directions. The animal gives a signal with its voice, and its cry is very reminiscent of a cough when a heavy smoker coughs. Nature has endowed marsupials with good hearing, so they can recognize even a quiet signal at a considerable distance.

Kangaroos do not tend to live in shelters. Only kangaroos from the rat family live in burrows. In the wild, representatives of the marsupial breed have countless enemies.

When there were no predators in Australia yet (predators of the European breed were brought to the continent by people), they were hunted by wild dingoes, wolves from the marsupial family, and small kangaroo species they were eaten by marsupials, of which there are incredibly many in Australia and from the order of carnivores.

Of course, large species of kangaroo can give a good rebuff to an animal attacking it, but small individuals are not able to protect themselves and their offspring. It would be hard to call a kangaroo a daredevil; they usually run away from their pursuer.

But when a predator drives them into a corner, they defend themselves very desperately. It is interesting to observe how a kangaroo defending itself, as a retaliatory blow, inflicts a series of deafening slaps in the face with its hind limbs, while “gently” hugging the enemy with its front paws.

It is reliably known that a blow inflicted by a kangaroo can kill the first time, and a person, when meeting an angry kangaroo, risks ending up in a hospital bed with fractures of varying severity.

Interesting fact: local residents say that when a kangaroo escapes persecution, they try to lure the enemy into the water and drown it there. At least, dingoes have experienced this many times.

Kangaroos often settle close to people. They are often found on the outskirts of small towns, near farms. The animal is not a pet, but the presence of people does not frighten it.

They very quickly get used to the fact that a person feeds them, but the kangaroo cannot stand a familiar attitude towards itself, and when trying to pet it, it is always wary, and sometimes it can attack.

Nutrition

Plant food is the daily diet of kangaroos. Herbivores chew their food twice, like ruminants. First they chew, swallow, and then regurgitate a small part and chew again. There are bacteria in the animal's stomach special type, which significantly facilitate the digestion of tough plant foods.

Kangaroos living in trees naturally feed on leaves and fruits growing there. Kangaroos, belonging to the rat family, prefer fruits, roots, and plant bulbs, however, they also like insects. Kangaroos cannot be called water-drinkers, because they drink very little and can do without life-giving moisture for a long time.

Reproduction and lifespan of kangaroos

Kangaroos do not have a breeding season as such. They can mate all year round. But nature has fully endowed animals with reproductive processes. The body of a female individual is, in fact, a producer of offspring, put on a wide stream, like a factory for producing cubs.

Males every now and then arrange mating fights and the one who emerges victorious does not waste time in vain. The gestation period is very short - pregnancy lasts only 40 days and one, less often two cubs, up to 2 centimeters in size, are born. This is interesting: The female can delay the appearance of the next offspring until the first litter is weaned.

The most amazing thing is that the offspring is actually born as an underdeveloped embryo, but instinct allows them to find their own way into the mother’s pouch. The mother helps a little along the first path in life, licking the baby’s fur as he moves, but he overcomes everything else on his own.

Having reached the warm mother's pouch, the baby spends the first two months of life there. The female knows how to control the bag with the help of muscle contractions and this helps her, for example, to close the marsupial compartment during rain and then the water cannot soak the small kangaroo.

Kangaroos can live on average fifteen years in captivity. Although there are cases where the animal lived to an advanced age - 25-30 years and by the standards of a kangaroo became a long-liver.