112 University of California Publications in Zoology [Vol. 30 



a Citellv^. Investig'ation showed that rock piles upon each of several 

 commanding eminences had been used as look-out points by one or 

 more of these falcons, evidently for a long time. The rocks were 

 plentifully splashed with droppings, and ptarmigan feathers and 

 other fragments scattered about told their own story. Brooks set 

 steel traps at three places, and on July 31 he caught a gyrfalcon in 

 one of them. It was an adult female, well started in the annual molt. 

 Molting tail feathers produced a gap that would have been con- 

 spicuous in flight and which did not appear in the bird first seen, so 

 there were evidently two, at least, of the species, ranging over this 

 mountain. 



On August 28 another gyrfalcon was seen on the slope of Monarch 

 Mountain, near Atlin. 



This, I believe, is the first reported summer occurrence of the 

 species in British Columbia. Atlin is far south of any previously 

 known breeding station in western North America. In all likelihood, 

 though, the gyrfalcon will be found nesting some distance still farther 

 south, on the high Alpine-Arctic plateau that covers so much of north- 

 western British Columbia. 



Falco peregrinus anatum Bonaparte. Duck Hawk 



Of rare occurrence. Single birds were seen on Tagish Lake, 

 May 27, near Atlin, June 29, on Spruce Mountain, August 8, and at 

 Lake Teslin, September 12. 



Falco columbarius suckleyi Ridgway. Black Pigeon Hawk 



No pigeon hawks were se>en until the southward migration had 

 begun. First noted August 11, when two were observed at different 

 times. From then on until September 21 (the last date of record) an 

 occasional bird was seen at long intervals, probably not more than ten 

 or twelve, all told. 



It was distinctly surprising that the two specimens collected 

 should prove to be typical examples of the subspecies suckleyi. Besides 

 these two, another, not collected, was observed through binoculars at 

 close enough range to establish its identity also as suckleyi without a 

 doubt. The other pigeon hawks seen were at too long range to permit 

 of subspecific determination. The two birds collected were an 

 immature male, shot in the town of Atlin on August 15 (no. 44736), 

 and an adult female, in the midst of the annual molt, shot on 

 August 28 (no. 44737). 



