These animals all live in various environments and move in different ways, but all have the following characteristics: four-chambered heart, hair, mammary glands, and internal skeleton, and an ability to regulate their body temperature internally.

has the distinction of being the smallest mammal; it is about 1.2 inches long and weighs less than a dime

is the largest mammal and the larges animal that has ever existed.

internal skeleton, which includes the vertebral column. It is a characteristic found in all vertebrates, including mammals.

do not rely on their surroundings to determine their body temperature, instead, they regulate their body temperature by internal mechanisms (panting, shivering, sweating, etc.)

A state of extremely low metabolism and respiration, accompanied by lower-than-normal body temperatures. Will not wake up if shaken. Happens to smaller mammals.

These animals do not have a drop in body temperature, but their overall heart rate, breathing, and other body functions slow down enough during this sleep that the energy they get from their fat keeps them warm and alive. Shaking can wake up this animal. Happens to larger mammals.

This is what gives mammals the class of Mammalia. These specially designed glands provide milk with the perfect balance of nutrients for young mammals. All mammalian young begin their development after birth using this source of nourishment.

a unique characteristic of mammals. It is found on all mammals, although it is not always easily seen.

the top layer that's stiff structure provides shape to the animals coat.

is usually soft and gives warmth

An animal's color or pattern that helps an animal blend in with its surroundings

whiskers on mammals that are specialized hair structures surrounded by extra nerve endings that make them very sensitive

found at the front of the mouth and are used for cutting or biting

are long, pointed teeth found to ward the front of the mouth and are used for tearing

are flat teeth found toward the back of the mouth used for grinding

animals that eat primarily meat

animals that eat primarily plants

animals that eat both vegetation and meat

mammals are the only animals to have this. Contractions increase the overall volume of the thoracic cavity and draws air into the lungs.

gives separate circulation to and from the lungs and to and from the rest of the body ensuring that only blood rich in oxygen is sent to the body.

the protein that gives hair its stiffness; the more keratin in a hair cell, the more rigid it will be.

biologists who study animals, usually classify mammals into about 18-20 different orders, though not all agree on the order for some mammals

the young of these mammals develop int he mother's uterus (womb) and receive necessary oxygen and nutrients from the placenta, which grows on the uterine wall acting as the lungs, kidneys, and intestines for the developing young

unlike most mammals, do not have seven neck vertebrae

is about 6 feet long with a large, bushy tail used to cover its body, may visit as many as 200 different mounds a day to get food

make up the order of Chiroptera "wing hand" are the only flying mammals.

distinctive feature of bats, they emit high-pitched sounds; when the sound waves hit an object, they bounce back to the bat. These echoes almost create a mental picture of their surroundings.

primates with tails. Divided into 3 main groups -- prosimians, New World, and Old World

are the groups of primates that are the smallest and look the least like the common monkey. The include lemurs, bush babies, lorises, pottos, and tarsiers.

have extremely long arms used for swinging from tree limb to tree limb using only the arms. When they run on the ground, it holds its arms above its head for balance. They eat only fruit.

a method of movement that uses the arms to swing from branch to branch

member of the dog family Canidae, can be found worldwide, although only domestic dogs are found in Antarctica and Australia.

dog family, includes wolves, coyotes, jackals, and foxes.

canines will often run in groups called

is the largest wild canine, once had the largest natural distribution of any mammal.

are similar in shape to wolves but much smaller

foxes live in burrows called

the largest cat, can be 10 feet long and weigh up to 650 pounds.

magnificent animals that can reach a length of 7 feet and weigh 500 pounds.

lions dwell together in groups called

thick layer of fat underneath their skin that keeps them warm

one eared seal you might see at an amusement park

have comblike plates known as baleen or whalebone crossing their mouth

the largest animal to have ever lived. It is a baleen whale. It is the fastest growing mammal

stand up to 13 feet high and weigh over 7 1/2 tons are of the order Proboscidea and are the largest land mammals

an order of animals including elephants and mammoths

Standing up to 13 feet high and weighing over 7 1/2 tons, of the order Proboscidea are the largest land mammals.

an order of animals including elephants and mammoths

Mammals found in this order make up the largest group of mammals; in fact, over one half of all known mammals species are rodents.

These gnawing mammals have two specially designed upper and lower incisors that will continue to grow throughout their lifetime. Of the order Rodentia.

is the most common North American tree squirrel.

Beavers build these. They are mounds above the surface of streams, out of trees and sticks. A beaver can chew through a tree with the thoroughness of a chainsaw.

found in South and Central America, are sheep-sized animals, making them the largest rodents.

have not only hair but also long, stiff quills that are sometimes barbed. The quills provide protection from predators and are an extreme example of specialized guard hair. When threatened they will stomp its feet and rattle its quills.

are different from rodents because they have upper incisor teeth. Rabbits, hares, and pikas make up this order.

Mammals with hooves

has three toes

this nocturnal animal's dark color helps camouflage it at night.

have only one toe and includes zebras, donkeys, and domestic horses.

animals that chew cud

all have unbranched, hollow horns and are grazing ruminants. Include cattle, sheep, goats, and antelope.

Even-toed ungulates are placed in this order

a four toed artiodactyl, is a useful animal for man, providing skins and meat. Some people even own them on farms for meat export.

are browsers, feeding on grasses and other plants that grow close to the ground. They will also feed on twigs, bark, and leaves.

baby deer, is born with spots for camouflage.

are commonly used for transportation in desert areas. The two species of this animal are Bactrian and Arabian, or dromedary

this camel has two humps

this camel has one hump

are vast stores of fat, not water

is the tallest living animal at 18 feet tall

is 15-foot-long, 5 foot-tall, 2-ton artiodactyl found throughout the waters of lower Africa.

are very aggressive and are considered one of Africa's most deadly animals

are found on adult male deer. When fully grown, they are dead bone without a covering

These animals are sometimes called "sea cows" because they graze like cows; however "sea cows" technically refers tot he Steller's sea cow, a giant sirenian that became extinct in the 18 century.

is found in coastal Atlantic waters in both fresh and salt water. Its rear fin is rounded like a paddle. They are generally 10 feet long and weigh 1000 pounds.

of the order Hyracoidea. Is a rodent-like mammal with a squat body and padded feet. It has short legs, ears, and tail. It primarily eats vegetation

The defenseless coney described in Prov. 30:26 as making its home among the rocks is this animal

glides the longest distance of any mammal, capable of gliding 100 yards at a time

of the order Marsupialia are mammals that have a pouch. (a few do not have pouches, but still use this type of reproduction)

the pouch where the young develop

the most famous of all the marsupials. Is found in many parts of Australia and New Guinea.

Kangaroos

kangaroo

kangaroos traveling in groups. They eat mostly grass and can live without drinking water; during extreme dry spells they will dig for water or eat roots that store water.

are the only marsupial found outside Australia and its surrounding islands.

is an Algonquian Native American word that means "white-faced"

are known for their ability to play dead

reproduce by laying eggs

included in this group are echidnas and platypus. Zoologist were amazed that these animals reproduce by laying eggs and yet have unique mammalian characteristics of hair and milk.

Found in Australian freshwater lakes, lagoons, and streams. It is one of the most distinctive-looking creatures in the animal kingdom.