230 KEY TO THE WATER BIRDS OF FLORIDA. 
with black; back and scapulars dusky; speculum gray ; bill dusky, showing a faint bluish gray 
band near the end. 
Adult female: ead brownish, the sides mixed with grayish brown, widening on the cheeks 
and base of the bill; belly whitish, becoming grayish on the lower portion; bill as in the male. 
Length, 17; Wing, 8; Bill, 2. : 
Aythya collaris (female). 
Aythya collaris (male). 
Species ranges throughout North America breeding north of the United 
States. It ranges south in winter to Guatemala and the West Indies. It is 
common in Florida, generally preferring fresh or brackish water to the ocean. 
The female of this species resembles the female Red-head, but is easily 
distinguished from that species by its smaller size. This species may be 
distinguished in any plumage from the Scaup Ducks by its gray speculum. 
The note somewhat resembles that of the Scaup Duck. In winter the collar 
of the male is usually absent or but slightly indicated. This species does 
not breed on the Atlantic coast. 
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