Рефераты. Mammals

though, because the mother rhino is probably close by. And even a tiger

does not want to make a four-thousand-pound rhino (1,800 kilograms) angry!

If a tiger is hungry enough, it may even attack a bear. But that may

be a big mistake.

Baby tigers look like cute kittens. At birth, they are about 12 inches

long (30 centimeters), and they weigh less than two pounds (one kilogram).

But in a year's time, these "kittens" will be big enough to hunt deer and

buffalo.

A mother tiger usually gives birth to two, three, or four cubs at a

time. This is necessary so that at least one of her cubs will survive. Many

predators attack tiger cubs. To help keep them safe, the mother stays with

her cubs for three or four years. During this time, the young tigers have a

lot to learn from her if they are to hunt and survive on their own.

Animals, unlike man, must either capture prey, or, evade predators. In

order for these animals, such as the tiger, to get close enough to its prey

for the attack, these animals must be able to hide, or blend in with the

background. That way the prey animal does not know that they are there…

The tiger uses what is known as disruptive camouflage, which means

that instead of blending in with it's surroundings, the tiger uses it's

stripes to break it's outline, or familiar shapes into smaller unfamiliar

shapes.

Like all young animals, cubs are full of energy. They spend their days

wrestling, chasing each other, and darting after butterflies. All this

exercise helps prepare them for their first real hunt. And they are ready

for this when they are about six months old.

It's hard to believe that in just six months, a playful little cub

will be a ferocious hunter. By then, it will weigh almost 200 pounds (90

kilograms) and have four big canine teeth for attacking prey.

A female tiger is one of the most loving and caring mothers in the

animal kingdom. She cuddles her babies to keep them warm. She feeds them

and protects them from enemies. For three years or more she looks after

them, teaching them how to hunt and survive in the wild.

This cub is only a few weeks old. In the wild, cubs are usually born

in caves and other protected places. The mother keeps them there and brings

them food for about three months. After that, the cubs are big enough to

follow her as she hunts for prey.

The life of a baby tiger can be dangerous. If a mother leaves her

cubs, even for a short time, they may be attacked by predators. Some of the

animals that like to eat tiger cubs are leopards (left), pythons (below

left), and hyenas (below right).

LEOPARDS

CLOUDED LEOPARD: PRECIOUS CARGO

One chapter in the Zoological Society's clouded leopard story began

early in 1983 with the arrival of a young pair of cats from the People's

Republic of China. The cats were a welcome addition to the Society

collection. Staff prepared a plan to encourage successful breeding, but

unfortunately, tragedy occurred before the plan could be implemented.

In the exhibit, the female was accidentally exposed to a male, which

severely mauled her right foreleg and shoulder. The injury was so severe

that, because of the initial trauma and resulting fast-spreading infection,

amputation of the leg and affected scapula were required to save her life.

The difficult surgery was masterfully conducted. Intensive care was

required for more than two months. The veterinary staff and a hospital team

kept the cat alive through repeated tube-feeding and frequent hands-on

care, despite the cat's aggressive distrust of such treatment. Following

many weeks of this regimen, the cat responded and made sufficient recovery

to allow her return to the leopard exhibit.

A primary hurdle had been cleared -- the female had survived the

injury. Next to be resolved were her adjustments to life on three legs and

finding a method which would allow her reintroduction to the Chinese male.

First, the mammal staff placed the cat in a program designed to help

her grow accustomed to life with three legs. After several months of

satisfactory progress, the staff decided to place her with the male, who

had been kept in a separate but adjoining room. The animals were allowed to

make contact as they chose. To the relief of all, the reintroduction was

successful. The cats proved to be compatible, and, shortly after

reintroduction, breeding took place.

On the morning of April 25, 1984, final proof of the success of a long

and difficult management program arrived-- a litter of two cubs. One cub

did not survive, but the other was taken to the Children's Zoo to be raised

by the nursery staff.

UNIQUE FELINE

The clouded Leopard has intrigued its public, been sought after for

its fur, and mystified those who would try to categorize it. During the

early morning hours of April 25, 1984, a discovery was made which was the

culmination of a saga, which held elements of zoo diplomacy and goodwill,

tragedy and suspense, cooperation and success. The discovery climaxed a

chain of events surrounding this paradoxical cat.

This cat has behavioral and physical traits typical of the small cats,

genus Felis, and the big cats, genus Panther. A paradox to taxonomists and

zoologists, it has been assigned to its own genus, Necrfelis, and is

considered a bridge between the two larger genera. A relationship to the

extinct saber toothed cat has even been suggested, based on the physical

characteristic of having, in proportion to body size, the longest canines

of all living felines. Its canine structure is also similar to that of the

saber-toothed cat.

The clouded leopard has a body size ranging from 24 to 42 inches (616-

1,066 mm) Its tail adds another 21 to 36 inches (550-912 mm) of length.

This leopard's weight falls between 35 and 50 pounds (16-23 kg). Its fur is

grayish brown to tawny yellow and has dark markings in a variety of shapes,

which seem to form cloudlike patterns.

The clouded leopard was once believed to be exclusively arboreal and

nocturnal. Recent observations in captivity and in the wild indicate,

however, that it may be considerably more terrestrial and diurnal than

previously thought. It is believed to prey upon birds, young buffalo,

cattle, deer, goats, monkeys, pigs, and porcupines. The species is

difficult to manage in captivity because of a tendency to be highly

aggressive toward other species and humans. The exceptionally long canine

teeth can easily inflict mortal injury. True to its paradoxical reputation,

however, some cats may become extremely affectionate toward humans, even

permitting and seeking physical contact.

NORTH CHINESE LEOPARD

This leopard is so rare that humans almost never see it in the wild.

It roams the forests and mountain meadows of northern China and Korea.

It makes its home in a great tangle of fallen trees and shrubs. When

it kills smaller animals it devours them right away. But when it comes to

larger prey, like deer and wild goats, the leopard drags the animal home to

save for several meals.

Don't be scared. The teeth of this snarling leopard won't hurt you.

On the contrary. It's the snow leopard that should be afraid. Its

relatives in the wild are in constant danger from poachers who want to

shoot them for their pelts and teeth.

Even though shooting leopards is illegal, it's considered "good

business." That's because some people still wear leopard fur coats, and

others believe that leopard teeth earrings and necklaces have special

powers.

SNOW LEOPARD: COLD WEATHER CAT

The shy, nocturnal and virtually unknown Snow Leopard is classified

with the big cats, but shares some small cat characteristics, for example

it doesn't roar and it feeds in a crouched position.

The Snow leopard has to contend with extremes of climate and its coat

varies from fine in summer to thick in winter. The surfaces of its paws are

covered by a cushion of hair, which increases the surface area, thus

distributing the animal's with more evenly over soft snow and protecting

its soles from the cold.

Snow leopards are solitary except during the breeding season, (January

to May), when male and female hunt together, or when a female has young.

One to four young are born in spring or early summer in a well-concealed

den lined with the mother's fur. Initially, the spots are completely black.

The young open their eyes at 7-9 days, are quite active by two months, and

remain with their mother through their first winter

Snow leopards are extremely rare in many parts of their range due to

the demand for their skins by the fur trade. Although in many countries it

is now illegal to use these furs, the trade continues and the species

remains under threat.

SNOW LEOPARD

They live in the snow-covered mountain peaks of Central Asia. How

high do these Asian Mountains rise? They reach 20,000 feet in altitude.

The snow leopard's long, thick fur keeps it warm even in the frosty

air, and its creamy white and gray color camouflages it in the snow.

Because humans are fond of turning its beautiful coat into coats for

themselves, the species is on the brink of extinction.

HYENS

SPOTTED HYENA

This hyena is also known as the "laughing" hyena. Sometimes a hyena

lets out a cry that resembles a wild human cackle.

Did you know that a hyena can gorge up to 33 pounds of meat extremely

fast? It needs to eat fast because as many as 50 other hungry hyenas may

be next to it, noisily feeding on the same piece of meat. Scientists have

seen 38 hyenas devour a zebra in 15 minutes, leaving only a few scraps

behind.

The hyena is famous for eating animal parts that other meat-eaters

won't touch. You might even see it stamping and biting on an ostrich egg,

trying to eat it. After devouring everything in sight, the hyena spits out

the horns, hooves, and bone pieces, ligaments and hair. If there are

leftovers, it buries the meat in a muddy pool. The hyena's good memory

leads it back to the hidden food when it's hungry again.

The spotted hyena hunts at night. Hyenas were once thought to be just

scavengers (animals that eat the meat left behind by predators). But now we

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