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Mammals

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  • 1. MAMMALS BES, Grade 4 Animal Unit
  • 2. Mammals…
    • … are vertebrates, meaning they have backbones.
    • … have fur or hair.
    • … are warm-blooded.
    • … nourish their young with milk.
    • … breathe air.
    • … have four limbs or fins and have a four-chambered heart.
  • 3. Mammals are a very diverse group!
    • Some mammals live on land, while others are aquatic animals.
    • Mammals very in size from tiny rodents to enormous elephants.
    • Some mammals can fly, while others walk on land.
    • Mammals have adapted to live in a variety of habitats.
  • 4. Mammals can further be divided into three groups:
    • Monotremes
    • Marsupials
    • Placental mammals
      • Let’s look a little more closely at each of these groups!
  • 5. What are MONOTRMES ?
    • Monotremes are primitive, egg-laying mammals.
    • Example: duck-billed platypus
  • 6. What are MARSUPIALS ?
    • Marsupials give birth to very underdeveloped young.
    • The young then develop in the mother’s pouch .
    • Examples: kangaroos and koalas
  • 7. What are PLACENTAL mammals?
    • Placental mammals give birth to more developed young .
    • Placental mammals have a longer gestation period than marsupials.
    • Examples: humans and dogs
  • 8. The diets of mammals differ as well.
    • Some mammals are carnivores .
      • Eat meat (other animals)
      • Examples: dolphins and tigers
    • Some mammals are herbivores .
      • Eat plants
      • Examples: cows and pandas
    • Some mammals are omnivores .
      • Eat both plants and meat (other animals)
      • Examples: people and some bears
    • Some mammals are insectivores .
      • Eat insects
      • Examples: aardvark and anteaters
  • 9. Directions:
    • Find a partner of the opposite gender.
    • Together read the text on mammals. As you read, highlight important information.
    • Complete the web on the back of the paper.