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KEY TO THE BIRDS OF EASTERN NORTH AMERICA. 
FAMILY FREGATID AE. 
Man-of-war Birds. Frigate Birds. 
Bill, hooked at tip; lores, feathered; upper plumage, entirely black; 
toes, four, all connected by webs; tail, forked ; wings, very long. 
* Group 1. Wing, over 21 inches long. 
Entire plumage, black (adult, male) ; general plumage, black; belly, white (fematze) 5 head 
and neck, whitish; belly, white; rest of plumage, black (immature). 
Fregata aquila. Man-of-war Bird. 
See No. 85. 
* For directions for measurement, see page 9. 
