Mammals

1
Mammals
2
A Mammals World

• Class Mammalia is a relatively small group of
  animals that are very well known. There are
  approx. 4500 species of mammals, with very few
  left to be discovered. Some discoveries are still
  possible, as is the case of the cloudrunner, a
  squirrel-sized mammal discovered in the late
  1990's.

3
Mammal Characteristics

• HAIR or FUR Hair usually covers the body of
  mammals but, in certain marine species, may be
  present on the young or consist of only a few
  whiskers.

4
Mammal Characteristics

• LIMBS Mammals typically have four limbs, with
  toes that terminate into nails, claws or hooves.
  Mammal limbs consist of arms, legs, wings, and
  flippers.

5
Mammal Characteristics

• TEETH With the exception of Whalebone Whales
  and Anteaters, all adult mammals have teeth.

6
Mammal Characteristics

• REPRODUCTION Mammals typically nourish their
  young while they are developing within their
  bodies through a placenta and give birth to them
  live. Two exceptions are the Duckbill Platypus
  and the Tasmania, which lay eggs.

7
Mammal Characteristics

• MAMMARY GLANDS - Mammal moms produce milk from
  mammary glands to feed and nourish their young.

8
Mammal Characteristics

• ENDOTHERMIC Also known as warm blooded. This
  does not mean that their blood is warm, yet,
  their body temperature is controlled internally
  and constantly maintained within a range of a few
  degrees.

9
Mammal Groups

• 1. Egg-laying (duck-billed platypus, spiny
  echidna)
• 2. Flying (bat)
• 3. Toothless (armadillo, anteater, sloth)
• 4. Marsupials (kangaroo, koala, opossum,
  wallaby)
• 5. Carnivores (dog, cat, bear)
• 6. Insectivores (mole, shrew, hedgehog)
• 7. Rodents (mouse, rat, squirrel, chipmunk,
  beaver, prairie dog)
• 8. Ungulates (cow, sheep, goat, pig, camel,
  giraffe, deer)
• 9. Trunk-nosed (elephant)
• 10. Marine (whale, dolphin, manatee)
• 11. Primates (monkey, ape, lemur, gorilla)