76 NORTH AMERICAN BIRDS. 
@, Feet always reddish. Adult: White, the head and neck tinged 
with buff, the shafts of the tail-feathers yellowish; remiyes 
hoary slate. Young: Above sooty brown, the quills and tail- 
feathers more hoary ; head, neck, and lower parts light smoky 
gray. (Plumage extremely variable, scarcely two specimens 
being alike.) Length about 27.00-30.00, wing 14.00-16.10 
(15.04), tail 7.75-10.65 (8.93), culmen 3.05-3.50 (3.26), depth 
of bill at base .95-1.20 (1.07). Zggs 2, 2.56 1.80. Hab. 
Intertropical seas, north to Florida and Lower California. 
116. S. piscator (Linn.). Red-footed Booby. 
a. Lower jaw (i.e., malar region), together with sides of chin and throat, densely 
feathered. (Subgenus Dysporus.) 
Legs and feet blackish. Adult: White, the remiges dusky brown, the 
head and neck above washed with buff. Young: Dusky, everywhere 
streaked or speckled with white. Downy young: Entirely covered with 
fluffy yellowish white down. Length 30.00-40.50, wing about 19.50, tail 
10.00, culmen 4.00. Zggs 1, 3.00 x 1.92. Hab. Coasts of the North At- 
lantic, south, in winter, to the Gulf of Mexico and northern Africa; 
breeding from Nova Scotia and British Islands northward. 
117. S. bassana (Linn.). Gannet. 
Famity ANHINGIDA.—Tue Anuincas. (Page 73.) 
Genera. 
(Characters as given for the Family)...........s0sccc000 Anhinga, (Page 76.) 
Genus ANHINGA Brisson. (Page 76, pl. XIX., fig. 3.) 
Species. 
Adult male in summer: Head, neck, and body glossy greenish black; other 
parts deep black, the scapulars and lesser wing-coverts beautifully spotted (longitu- 
dinally) with light silvery gray; exposed surface of middle and greater wing- 
coverts light silvery gray; tail broadly tipped with pale brown, passing into 
whitish terminally ; sides of neck and hinder part of head, ornamented with length- 
ened, loose-webbed, or hair-like feathers of a dirty whitish or pale grayish lilac 
color; feathers of hind-neck also elongated and hair-like, forming a sort of mane, 
but black. Adult male in winter: Similar, but lacking all the elongated feathers of 
head and neck. Adult female in summer : Head, neck, and breast grayish buff, darker 
on top of head, lighter on breast, where bordered below by a band of chestnut next 
to the black of the belly; sides of upper neck with a few whitish loose-webbed 
feathers; otherwise, colored like the male. Adult female in winter: Similar to sum- 
mer plumage, but lacking entirely any ornamental, or lengthened, feathers on head 
or neck. Young in second year (?): Similar to adult female, but lower parts duller 
