308. 
726 SYSTEMATIC SYNOPSIS. — STEGANOPODES. 
especially considering the shape of the pouch} the skin is usually brightly colored, and some- 
times carunculate. The eyes, as a rule, are green —a color not common among birds. These 
birds are highly psilopedic as well as altricial; the young are for some time blind, naked, and 
perfectly helpless. 
Twenty-five species of Cormorants may be considered established. Their study is difficult, 
owing to the great changes in plumage, the high normal variability in size, and their close 
inter-relation, which is such that the single genus Graculus does not appear capable of well- 
founded division. Species are found all over the world, excepting the uttermost polar regions, 
and are usually very abundant in individuals; they are all very much alike in their habits. 
Many are maritime, but others range over fresh waters as well. They are eminently grega- 
rious, especially in the breeding season, when they congregate by thousands —the boreal 
kinds generally on rock-begirt coasts and islands, those of warm countries in the dense fringes 
of shrubbery. They often migrate in large serried ranks. The nest is rude and bulky; the 
eggs are commonly two or three, of elliptical form and pale greenish color, overlaid with a 
white chalky substance. The Cormorants feed principally upon fish, and their voracity is 
proverbial, though probably no greater than that of allied birds. Under some circumstances 
they show an intelligent docility ; witness their semi-domestication by the Chinese, who train 
them to fish for their masters, a close collar being slipped around the neck to prevent them 
from swallowing the booty. 
PHALACRO’CORAX. (Gr. qdadakxpoxdpaé, phalakrokorax ; Lat. phalacrocorax, a cormo- 
rant, sea-crow, corvus marinus: gadaxpos, phalakros, bald, and kopaé, korax, a raven.) 
CORMORANTS. Character as above said. There appears to be but one genus in the family, 
but several groups of species may be cited subgenerically. There are three such groups among 
our species, respectively exemplified by P. carbo, P. dilophus, and P. violaceus. 
Analysis of Species. 
Tail of 14 feathers. 
Gular sac heart-shaped behind, bordered with white ........++..+.-... . carbo %50 
Tail of 12 feathers, 
Gular sac conyex or nearly straight-edged behind. 
No white border behind gular sac. 
Lateral crests of curly feathers on sides of head. 
Largest: length abont 36.00. Developing white filaments on head in breeding season. 
IND Wis COAStes cm emes Gy rey flee elise ter tc’ os) cheap cep tie eboney eden COIL COTETIOLETUSMETNE 
Medium: length 30 00-33.00. Scarcely or not developing white filaments on head in breed- 
ing season. At large Cavan Mee keen sph Ves sceeeadt Yea phe dilophus 75 
Small: length 30.00 or less. Probably not developing white filaments. S. E. Coast 
: Jloridanus 753 
Small: size of the last. Developing white filaments. S. W. Coast. . . . albociliatus 7538a 
A border of white feathers behind the sac. 
Very small: length about 24.00 - . . . . . . . «2s 5. » » « - . mexicanus Th 
Gular sac heart-shaped behind. (No lateral crests. ) 
Sac dark-blue, bordered by a fawn-colored gorget Feathers of back distinct, dark-edged 
penicillatus T55 
Sac not bordered with a colored gorget. No distinct colored edges of feathers of back. 
Shafts of tail-feathers said to be white . .......... . .. perspicillatus 756 
Shafts of tail-feathers not white. 
Frontal feathers not reaching bill, which is entirely surrounded with red skin; base of 
Diullthlue es eS sw Sed ae ar ec, 5's), cA re PRMOCC ENTE oMnsC Ot 
Frontal feathers reaching bill. 
hareers wing O00lormore s.. 5 5. «6 ws ol ee MEGREOUS = (D5 
Smaller: wing nderdo00im 3.5. yy. ss eterna ORun es a= eOREE OCU Do 
750. P.car’bo. (Lat. carbo, carbon: from the black color.) Common CoRMORANT. SHAG. 
Adult @ 9: Tail of 14 feathers (here only amnong our species). Gular sac heart-shaped 
behind. Bill blackish, whitish along edges and at base below. Iris green. Skin about eyes 
livid greenish, orange under the eye; sac yellow, bordered behind by a gorget of white 
feathers. General plumage glossy greenish-black ; feathers of back and wing-coverts distinct 
