MAMMALIA 409 



13. What is a nest? Have amphibians, fishes, reptiles, and mammals 

 anything that corresponds to a nest? If so, what is it called? How made? 

 When? Why? When used? 



14. Intelligence of Birds. — Compare with other classes of chordates; as 

 a class. 



15. Habitat of Birds. — Name some birds that are: (1) aerial (most of 

 the time); (2) aquatic; (3) arboreal; (4) terrestrial; and (5) subterranean. 

 What conditions have brought about these various habitats? 



16. Rivalry. — Name examples of rivalry: (1) by battle; (2) by song; and 

 (3) by color among birds. 



17. Parasites. — Name internal and esternal parasites of wild birds; of 

 domesticated ones. Name birds that are parasites. (See p. 302, The 

 Cowbird.) Do you know of others? 



18. Animal Behavior. — ^See Laboratory Guide, p. 12, and report on the 

 bird's behavior, points 1-9. 



19. Compare the bird and reptile on points 1-9. Which shows the more 

 animal behavior? 



20. Bird Pests. — Do birds ever become a nuisance or a pest? For ex- 

 ample, the English sparrow. Give others. Do birds carry parasites or 

 disease? How guard against them? 



21. Bird Pets. — What birds are used for pets? What was falconry? 



22. Domestication. — What birds are now or have been domesticated by 

 man? For what use? 



25. Dispersal. — Name all means of dispersal by birds, their yoimg, or 

 their eggs. 



24. Barriers. — Name all barriers to bird dispersal. 



25. The Character, or Disposition of Birds. — Compare with other chor- 

 date classes, the reptiles, for example. 



26. Which was first in time, the bird or the egg? Give your reasons care- 

 fully? 



MAMMALIA 



1. Covering. — Name the kinds of covering of mammals and state 

 their uses to the mammal and to man. 



2. Scales. — Name mammals that possess scales, c. g., the tail of a rat. 

 Name other examples. 



3. Teeth. — Name and describe the four kinds of teeth possessed by 

 mammals and state the use of each kind in the digestion or life of the 

 mammal. 



4. In what orders of mammals do you find claws, nails, hoofs, horns? 

 Purpose of each to the mammal? 



5. Glands of Mammals. — Sebaceous (oil), sudoriferous (sweat), lachry- 

 mal (tear), scent, and mammary glands are all modified cutaneous glands. 



