8o Field Museum of Natural History — Zoology, Vol. IX. 



General plumage, white; tips of primaries, tinged with slaty blue; 



legs, yellowish olive (immature). Florida c a; rule a. 



Little Blue Heron. 



See No. 86. 



General plumage, white; ends of primaries, not tinged with slaty 

 blue; legs, black; feet, yellow. Egretta candidissima. 



Snowy Heron. Snowy Egret. 



See No. 84. 



General plumage, tawny brown, mottled and streaked with dark 

 brown; upper surface of primaries, blackish. 



Botaurus lentiginosus . 

 American Bittern. 



See No. 79. 



Bill, large; top of head, black; back, green (adult) ; culmen, about 

 as long as tarsus. Nycticorax nycticorax ncevius. 



Black-crowned Night Heron. 



See No. 88. 



Bill, large; top of head, white or whitish; back, not green (adult) ; 

 culmen, much shorter than tarsus. Nyctanassa violacea. 



Yellow-crowned Night Heron, 



See No. 8g. 



Bill, large; general plumage, mottled, and streaked brown and 

 white; outer edge of primaries, reddish brown (immature); culmen, 

 about as long as tarsus. Nycticorax nycticorax ncevius. 



Black-crowned Night Heron. 



See No. 88. 



Bill, large; general plumage, mottled and streaked brown and 

 white; primaries, slaty brown (immature); culmen, much shorter 

 than tarsus. Nyctanassa violacea. 



Yellow-crowned Night Heron. 

 See No. So. 



