AVES SPHENISCIDyG. 



95 



FIG. 57. 



FIG. 58. 



Pygoscelis antarctica. Profile head and 

 neck, natural size. 



Pygoscelis antarctica. Head from above, 

 natural size. 



GENERAL DESCRIPTION. 



Size (adult). Total length, about 30 inches. Culmen (gape to tip), 

 2.65 inches. Culmen (from nasal feathers to tip), 1.4 inches. Wing 

 (from shoulder to tip), 7.5 inches. 



Color (adult). Upper parts much as in P. papua but brighter, the tips 

 of the feathers being of a lighter tint. 



Lower parts generally white. 



Head : Top of the head of the same bluish grey prevailing on the upper 

 parts, this color reaching to the nasal feathering, interrupted by white 

 lores and a white band over each eye. 



Neck : Above like the back ; below and on the sides white, broken by 

 a narrow black line crossing the throat in a semi-circle from ear to ear. 



Back: Bluish-grey; each feather with a dark base and a bluish grey 

 tip. 



Wing: (Flipper). Outer surface bluish grey like the back; edged 

 posteriorly with white. Inner surface white, with a blackish outer margin 

 and a blackish terminal spot. 



Tail : Colored like back and composed of twelve feathers. 



Under parts : White. 



In worn plumage the adult bird becomes brownish black above by the 

 wearing off of the blue-grey margins to the feathers. 



Young birds have their tail composed of fourteen feathers. The outer 

 one on each side is shed at the first moult and not replaced. 



