30 TUBINARES: Tube-nosed Swimmers 



FORK-TAILED PETREL 



(105. Oceanodroma furcata) 8 in. 



Wholly pearly-gray with darker wings and blackish about 

 eye. Tail deeply forked. 



Our only light-colored Petrel. 



Its food consists of animal oil or bits of fat skimmed from the 

 ocean surface. Said to follow floating carcasses of whale or seal 

 to secure these titbits. 



BLACK PETREL 



(107. Oceanodroma melania) 9 in. 



Entirely sooty black except grayish wing-coverts; under parts 

 somewhat lighter. 



Food habits like those of Petrels generally. In its nesting, 

 however, instead of keeping in colonies these birds scatter and 

 nest wherever individual tastes dictate. Also, it appears rarely 

 or never to dig a burrow in the earth, preferring a nook under- 

 neath a rock, or possibly the deserted hole of an auklet. 



SOCORRO PETREL 



(108.1. Oceanodroma socorroensis) 8^ in. 

 Sooty-black above; brownish below; whitish on sides of rump; 

 no white patch on under wing. (Compare Ashy Petrel). 



ASHY PETREL See Appendix 



(108. Oceanodroma homochroa) 8j in. 



KAEDING PETREL See Appendix. 



(105.2. Oceanodroma kaedingi) 8j in. 



