KEY. 289 



KEY TO ORDERS. 



I. WATER BIRDS. 



a, bill, pointed. 



1, dive from water. 

 U, dive from air. 



3, dive from water and perch. 



4, do not dive. 



1, head, carried over body, neck thin; A, p. 11. 

 1, head, carried over body, neck, thick; C, A, 

 p. 16. 



1, head, carried in advance of body; B, p. 14. 



1, large, white; E, B, p. 29. 



2, smaller; F, C, p. 48. 



3, neck, very long; E, p. 34. 



4, central tail feathers, very long; E, A, p. 27. 



b, bill, hooked. 



1, dive from water. 



2, dive from air. 



3, drop into water. 



4, do not dive. 



1, bill, slender; N, A, p. 120. 



2, dark; E, D, p. 32. 



3, large; E, C, p. 30. 



4, swoop down for food; F, A, p. 27. 



4, fly high over surface of water- tail, forked, 

 E, F, p. 35. 



4, ocean birds, fly close over surface; D, p. 21. 

 C, bill, compressed. 



1, bill, black; C, A, a, p. 16. 



2, bill, red; C, A, e, p. 20. 



d, bill, conical. 



1, small; C, A, d, p. 19. 



e, bills, flattened, toothed. 



1, N, excepting A, p. 120. 



