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31-2_birds - Reading Guide 31 2 Birds Name 1 Birds are...

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Reading Guide 31 – 2, Birds Name: __________________________________ 1. Birds are reptile like animals that maintain a constant __________ body temperature. 2. They have an outer covering of ______________________; two legs that are covered with __________________________ and are used for walking or perching; and front limbs modified into _____________________________. 3. The single most important characteristic that separates birds from living reptiles is _______________. 4. The two main types of feathers are __________________ and _____________________. 5. Contour feathers provide _________________________________________. 6. Down feathers provide _____________________________. 7. Label the feather (Fig 31-11) 8. Paleontologists agree that birds evolved from ___________________________. 9. Archaeopteryx was the first birdlike ____________________________ found. 10. The Archaeopteryx had ___________________ in its beak, a ________________ tail, and toes and claws on its _____________________. 11. The four main adaptations that allow birds to fly are a. ________________________________________________________________________ b. ________________________________________________________________________ c. ________________________________________________________________________ d. ________________________________________________________________________ 12. Animals that can generate their own heat are called __________________________. 13. Any body heat lost by the bird must be regained by __________________________ food. 14. Birds’ _______________ or bills are adapted to the type of _______________ they eat. 15. You can tell a good deal about a bird’s feeding habits from its __________________.
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