Appendix, 



GOATSUCKER FAMILY. 



Mottled brown birds, largely nocturnal or crepus- 

 cular in habits, with very weak bills and wide 

 opening mouths, surrounded with bristles. 

 Insectivorous in habits, catching their food while 

 on the wing. 



59. California Poorwill; Phalcenoptilus nuttalli 

 calif amicus Ridgw. 



The western representative of the whippoorwill. 

 Seldom seen abroad by day. An inhabitant of 

 the mountain forests. Plumage intricately 

 mottled with soft shades of gray and brown, 

 with a peculiar effect of frosting. Conspicuous 

 throat-patch and tips of tail-feathers white, the 

 latter often tinged with buffy. Breast blackish 

 brown. Tail square. 



60. Western Nighthawk; Chordeiles virginianus 

 henry i (Cass.). 



As in the poorwill the plumage is mottled and 

 barred with intricate patterns of black, gray and 

 brown. Throat bar of white. The nighthawk 

 may be recognized from the poorwill by the 

 conspicuous bar of white or buffy on the wing, 

 and by the emarginate tail, with a white sub- 

 terminal bar. It is less strictly nocturnal and 

 may frequently be seen flying abroad, especially 

 toward evening, cleaving the air in great swoops, 

 and uttering its high, single, slightly inflected 

 note while on the wing. The western night- 

 hawk differs from the eastern bird in its paler 

 shade of coloration. 



