Mammals are one of the 6 Classes of Animals




There are about 4,000 kinds of mammals, 21,000 kinds of fish
and 800,000 kinds of insects!
Mammals have these characteristics which make them the same!!
- Warm Blooded
- Swim in water or walk on land
- Mammals are the only animals with true hair
- Mammal Babies: All drink Milk!
- Most mammal babies live inside their mothers before they are born, just like
humans.
- People have "baby teeth" or "milk teeth". So do all of the other mammals! The
only exceptions are mammals like anteaters -- they don't have any teeth at all.
- Mammals are vertebrates, which means that they all have backbones (spines).
Believe it or not, most animals don't have backbones -- mammals are one of the
few groups that do.
- All mammals, except some sea cows and sloths have 7 bones in their necks. This
includes giraffes who have VERY long spines! Their necks can be 6 1/2 feet long,
but they're still made up of just 7 bones.
Types of Mammals
Monotremes: Primitive egg-layers.
Echidnas (spiny ant-eaters)
Duck-billed platypus.
Marsupials: Young are born in an embryo state
Most female have pouches
Koala
Kangaroo
Opossum
Placental: Young are born at a relatively advanced stage
Young are nourished through a placenta.
Cats
Dogs
Deer
People
Different Mammalian Diets:
Herbivores (plant eaters): Beavers, cows, horses, pandas, sloths
Carnivores (meat eaters- Whales and dolphins, dogs, tigers, lions
Omnivores (eat plants and meat): People, some bears,
Insectivores (eat insects): Aardvarks, anteaters, pangolins
Mammal Extremes
Fastest: Cheetah (60-70 mph = 97-110 kph)
Slowest: Sloth (less than 1 mph, or 2 kph)
Biggest in Ocean: Blue whale
Biggest on Land: African Elephant
Tallest: Giraffe
Smallest: Pygmy Shrew (weighing 1.2-2.7 gm)
Bumblebee Bat (weighing about 2 gm)
Loudest: Blue Whale.
Smallest newborns: Marsupials (pouched mammals, like the kangaroo)
Smelliest: Striped Skunk
Venomous: Duckbilled Platypus (males only)
Shrew (some species)
Solenodon (a small insectivore)
Fatest: Blue whale has the thickest layer of blubber
Ringed seal pups have the greatest
percentage of fat (about 50 %).