KEY TO THE WATER BIRDS OF FLORIDA. 237 
SuspramMiLty ANSERIN-E. GEESE. 
Genus CHEN Botz. 
CHEN HYPERBOREA NIVALIS (forst.). 
Greater Snow Goose. 
General plumage white; primaries black and 
primary coverts paie ash. The immature bird 
has the head, neck, and upper parts mottled gray 
and white; the rump and tail are white; under 
W ) parts white. 
ag Length, 34; Wing, 17.40; Bill, 2.50; Tarsus, 
a 3.10. 
This species ranges throughout North America. Its 
breeding place is unknown, but is probably in the far 
North. It ranges in winter south to the Greater An- 
tilles. Itis not a common bird in Florida, but speci- 
mens occasionally occur there. It has been taken in 
Key West and a number of times on the west coast. 
CHEN C/ERULESCENS (Zinn). 
Blue Goose. 
Head and neck white or buff; dusky gray on 
the neck and back, shading into whitish on the 
under parts; wings ashy gray, the rump and 
upper tail coverts grayish white or white; some 
of the quills and tail feathers dusky, showing 
white on the edges; primaries are black. 
The immature bird of this species has the 
head and neck grayish brown, shading into dull 
white on the chin. 
Length, 30; Wing, 16; Bill, 2.20; Tarsus, 3.10. 
The habits of this species are but little known, and for a long time it 
was supposed to be the young of the Snow Goose. 
