DARTERS CORMORANTS 39 



coverts without light-colored patch, but rump with gray or whitish patch 

 on side. Wing: 5.80-6.38, tail 3.07-3.42, forked for .71-.92, bill .5S-.65. 



Distribution. From islands of western coast of Mexico north to San 

 Diego, California. 



ORDER STEGANOPODES : TOTIPALMATE 

 SWIMMERS. 



(FAMILIES ANHINGID^E, PHALACROCORACIDJE, PELECANIDJE, 

 FREGATID^E, ETC.) 



FAMILY ANHINGID-2G: DARTERS. 



GENUS ANHINGA. 



118. Anhinga anhinga (Linn.). ANHINGA. WATER TURKEY. 



Bill straight and sharp ; form extremely slender, tail long and rigid, 

 without upper coverts. Adult male in breeding plumage : glossy greenish 

 black ; back of head and sides of neck with long white or grayish filaments, 

 and back of neck with black hair-like mane ; shoulders and base of wings 

 finely spotted with gray, wing crossed with wide gray band ; back striped 

 with pearl gray ; tail tipped with brownish. Adult male in winter : head and 

 neck without elongated filaments. Adult female in breeding plumage : 

 similar to male but head and neck brown, throat and breast buffy. Young : 

 lower back, tail, and quills black ; head and rest of body brown except for 

 buffy or whitish throat and breast, and gray streaking on wing coverts. 

 Length : 32.25-36.00, wing about 14, tail 11, bill 3.25. 



Distribution. From tropical America north in Lower Sonoran zone to 

 South Carolina, southern Illinois, Texas, western Mexico, and casually to 

 Kansas. 



FAMILY FHALACROCORACID^E : CORMORANTS. 

 GENUS PHALACROCORAX. 



General Characters. Bill slender and abruptly hooked at tip ; mouth 

 opening back under eye ; skin around eye and at base of lower mandible 

 naked ; head smooth or variously crested. 



KEY TO SPECIES. 



1. Gular sac convex or truncate at posterior edge. 



2. Gular sac bordered with narrow line of white feathers. Size small. 



mexicanus, p. 41. 

 2'. Gular sac not bordered with white. 



3. Crest over each eye black dilophus, p. 40. 



3'. Crest over each eye partly white. 



4. Size large, wing over 13. N. W. coast . . cincinatus, p. 40. 

 4'. Size smaller, wing under 13. California coast. 



albociliatus, p. 40. 



1'. Gular sac heart-shaped at posterior edge. 

 2. Flanks without white, head not crested . . penicillatus, p. 41. 



