PYGOPODES: Diving Birds 



PACIFIC LOON 



(10. Gavia pacifica) 2 feet. 



Notably smaller than preceding which it somewhat resembles 

 in winter. 



Summer: Crown and hind-neck, gray; breast and belly white; 

 otherwise black, white-striped on sides of neck, and with white 

 spots of back and wings in patches. In highest plumage, throat 

 is glossed with violet. 



Winter: Brownish-black above, with few white spots; below 

 white, grayish on neck. 



Young: Dusky above, feathers gray-edged; white below, 

 smoky on throat and cheeks. 



RED-THROATED LOON 



(11. Gavia stellata) 2 feet. 



Summer: Back dusky; head and neck leaden gray; throat with 

 a chestnut patch; body white below. 



Winter: Upper parts dusky-gray, finely speckled with white 

 on back and wings; under parts white, including cheeks; throat 

 sometimes dusky-specked. Occurs within our limits only in 

 winter plumage. 



Notably more slender than the Pacific Loon, which it equals 

 in length, its general appearance is much grayer. 



FAMILY PUFFINS, etc. 

 TUFTED PUFFIN 



(12. Lunda cirrhata) 15 in. 



Summer: Entirely sooty, except white cheeks and forehead and 

 tuft of long straw-colored feathers behind eyes. 



Winter: Cheeks also sooty, plumes usually absent; many 

 white feathers on under parts. 



Bill very deep and thin; terminal half bright red in spring; 

 raised portion on the basal half is moulted in summer, to be 

 gradually renewed in late winter. 



The grotesque bill and plumes of the nuptial dress are dis- 

 tinctive. 



