26 



KEY TO GREBES (Cont.) 



6' Width and height of bill at base similar, tip may be slightly up- 

 turned; tarsus 38-44.5 mm. In winter, dark of cap extending 

 below eye; in breeding plumage, neck and upper breast black, some 

 chestnut on flanks. EARED GREBE 



KEY TO ALBATROSSES 



1 Body, head and neck white or mottled white and dark brown. 2 

 1' Entirely dark brown. 3 



2 Area of back between wings white or mottled white and dark brown; 

 culmen 120-145 mm; bill depth measured at anterior edge of nares, 

 34-35 mm; tarsus 91-101 mm; wing length 518-555 mm. 



SHORT-TAILED ALBATROSS, adult 



2' Area of back between wings entirely dark; culmen 99-114 mm; bill 

 depth 24-34 mm; tarsus 78-86 mm; wing 470-510 mm. 



LAYSAN ALBATROSS, adult and immature 



3 Bill and feet light tan or yellow; measurements as in 2 



SHORT-TAILED ALBATROSS, immature 



3' Bill and feet black or dark brown; culmen 94-113 mm; bill depth 29- 



40 mm; tarsus 80-95 mm; wing 485-533 mm. 4 



4 Considerable white on face. BLACK-FOOTED ALBATROSS, adult 

 4' No (or only a very small amount of) white on face. 



BLACK-FOOTED ALBATROSS, immature 



sub adult, or young adult 



