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