92 



KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 



General plumage, tawny brown, mottled and streaked with dark brown ; upper surface of 

 primaries, blackish. Botaurus lentiyinosns. American Bittern. 



See Xo. 145. 



Bill, large; top of head, black; back, 

 green (adult). 



Nycticorax nycticorax na'rius. 



Night Heron. 

 See No. 159. 



Bill, large ; top of head, white or whit- 

 ish ; back, not green (adult). 

 Nycticorax violaceies. 



Yellow-crowned Night Heron. 



See Xo. 160. 



Bill, large; general plumage, mottled, 

 and streaked brown and white; outer edge 

 of primaries, reddish brown (immature). 

 Nycticorax nycticorax ncevius. 



Night Heron. 

 See Xo. 159. 



Bill, large; general plumage, mottled 

 and streaked brown and white ; primaries, 

 slaty brown (immature). 

 Nycticorax violaceus. 



Yellow-crowned Night Heron. 

 See Xo. 160. 



