1. Diversity of Mammals
5th Grade

2. There are 3 main groups of mammals
There are 3 main groups of mammals. These groups differ in how their young develop.

3. 3 main groups of mammals:
1) Monotremes
2) Marsupials
3) Placental Mammals

4. Monotremes are still considered mammals because they drink milk from their mother’s skin
An Anteater lay eggs directly into a pouch in the mother’s belly
A Duck-billed platypus lays her eggs in an underground nest

5. Monotremes

6. Monotremes Egg-laying mammals ONLY 3 SPECIES: -2 species of anteaters
-Duck-billed platypus
Why are these still considered mammals?

7. Marsupials
Mammals whose young are born at an early stage of development, and they usually continue to develop in a pouch on the mother’s body
short gestation period: the length of time between fertilization and birth

8. When born, marsupials are blind, hairless, and pink!

9. Examples of Marsupials
Kangaroos
Wallabies
Koalas
Wombats
Tasmanian Devils
Possums
Gliders

10. Marsupials - Kangaroo

11. Marsupials—Wallaby

12. Marsupials-Koala

13. Marsupials--Wombat

14. Marsupials—Tasmanian Devil

15. Marsupials--Possums

16. Marsupials--Gliders

17. Placental Mammals
Develops inside its mother’s body until it can function independently
Name comes from placenta: an organ in pregnant female mammals that passes materials between the mother and the developing embryo
Food and oxygen pass from the mother to her young
An umbilical cord connects the young to the mother’s placenta.

18. Most mammals are placental mammals
The gestation period for animals usually depends on their size
Elephants have a 21 month gestation period
Mice have a 20 day gestation period

19. Placental Mammals are grouped based on how they eat and move

20. Placental Mammals – Carnivores: have large canine teeth and clawed toes to catch prey
River Otters
Dogs
Raccoons
Seals

21. Placental Mammals - Rabbits and Hares – Leaping mammals with long hind legs & long, curved incisors for gnawing

22. Placental Mammals -- Marine Mammals (marine = ocean)
Whales
Manatees
Dolphins

23. Placental Mammals –Rodents –are gnawing mammals such as mice rats, beavers, capybaras

24. Placental Mammals – Trunk-nosed mammals
Elephants
Woolly Mammoth (extinct)

25. Placental Mammals – Flying Mammals
Bats –their wings are made of a thin skin that stretches from their wrists to the tips of their long finger bones
Flying Fox Bat

26. Placental Mammals – Insectivores
Moles
Shrews

27. Placental Mammals - Primates
Have large brains and eyes that face forward
Include humans, monkeys, chimpanzees, orangutans, lemurs, etc.

28. Placental Mammals –Primates-Gorilla

29. Placental Mammals –Primates --Chimpanzees

30. Placental Mammals –Primates --Gibbons

31. Placental Mammal –Primates -Lemur

32. Placental Mammals--Primates--Bush babies

33. Placental Mammals –Primates--Marmocet

34. Placental Mammals –Primates -Tamarin

35. Placental Mammals –Primates-Toothless Mammals
Have either very small or no teeth
Armadillos
Sloths

36. Placental Mammals –Primates - Hoofed Mammals
Cows
Deer
Pigs
Horses
Zebras

37. Caring for Young
Monotremes, Marsupials, and Placental Mammals all care for their young
Baby mammals are helpless for a long time after being born –many are born blind or without insulating fur
Young mammals stay with their mothers or both parents for an extended period of time

38. Rhinoceros with baby

39. Chimpanzee mother and baby

40. Mother with lion cubs

41. Colobus Monkey with baby

42. Labrador with babies

43. Polar bear with baby

44. Panda Bear mother with baby