336 University of California Puhlications in Zoology [Vol. 24 



Buteo borealis calunis Cassin. Western Red-tailed Hawk _ 



Several pairs were breeding' near Hazelton and in Kispiox Valley. 

 In the latter locality, not far from our camp, there was an occupied 

 nest at the top of a tall tree that towered above a surrounding jungle, 

 too impenetrable to be traversed. 



Toward the end of August there was a noticeable increase in the 

 number of red-tails observed, due probably to an influx of migrants, 

 and many were seen up to the end of my stay, September 26. There 

 was wide variation in color; light-breasted birds were seen and some 

 exceedingly dark ones. One specimen was collected (no. 42048), an 

 immature male, taken in Kispiox Valley August 27. It is in the dark 

 phase of plumage, blackish throughout with extensive white streaks 

 and blotches partly concealed at the bases of the feathers. 



Buteo swainsoni Bonaparte. SAvainson Hawk 



Hawks supposed to be of this species were seen occasionally late 

 in August and early in September, but only one was shot. This bird 

 (no. 42049) is an immature male, taken in Kispiox Valley, August 24. 

 Its stomach contained a toad. 



Aquila chrysaetos (Linnaeus). Golden Eagle 



Seen at intervals during the summer, at Hazelton, at the base of 

 the nearby mountain range, Rocher Deboide, and on Nine-mile Moun- 

 tain. From July 16 to 20 one was seen daily at Hazelton, haunting the 

 river banks and evidently, feeding on dead salmon. On Nine-mile 

 Mountain one followed a regillar beat almost daily, recognizable as the 

 same individual through a peculiarity of marking. This bird wa»« 

 hunting marmots assiduously and swung about the mountain side Ioav 

 over the ridges, apparently trusting his sudden appearance to enable 

 him to surprise a marmot at a distance from shelter. 



Haliaeetus leucocephalus alascanus C. H. Townsend. 

 Northern Bald Eagle 



Seen in the lowlands at various times during the summer. As the 

 season advanced, the dead and dying salmon on the river banks were 

 a bountiful source of food to the eagles, and increasing numbers of 

 the birds appeared. "What seemed to be entire families were seen 

 several times, in July, groups composed of two adults with two or 

 three full-grown young. 



