214 University of California Publications in Zoology [Vol. 24 



On our trip up the river in early May, many nests were noted along 

 the lower parts of the stream, easy to see at that season as the trees 

 were still bare of leaves. On our return trip in August the abundant 

 foliage hid most of the structures, but one at least was noted (on 

 August 16) with a young bird still sitting on the edge of the nest.. 

 At Sergief Island bald eagles were seen daily. 



Falco peregrinus pealei Kidgway. Peale Falcon 

 One shot on the marsh at Sergief Island on September 1. This 

 bird, an immature of the year, differs appreciably from the mode of 

 young anatum, as represented by specimens from various parts of 

 North America. The main difference consists in the Sergief Island 

 specimen being more heavily marked beneath, in its almost totally 

 lacking the cinnamon tinge below that is so characteristic of anatum, 

 and in the lack of paler edgings to the feathers of the upperparts. 

 This falcon contained in its stomach the remains of a shoveller 

 {Spatula clypeata). 



Falco columbarius columbarms Linnaeus. Pigeon Hawk 

 Not seen until the latter part of the summer, when the migration 

 had begun. If the species breeds throughout the region we were 

 exploring, it is to be supposed that the birds are few in numbers and 

 in widely scattered pairs. First seen at our Flood Glacier camp, 

 August 1, next, on our way down the river to the Great Glacier, 

 August 8. On Sergief Island, the latter part of August and the first 

 week in September, pigeon h^^wks were seen almost daily, but they 

 were wary and seldom came within shooting distance. 



Two specimens were secured, a female at Great Glacier, August 14 

 (no. 39762), and a male (no. 39763) at Sergief Island, September 2. 

 Both are immatures. The Sergief Island bird is an average example 

 of columbarius at that stage. The Great Glacier specimen is darker 

 colored. Below, it is indistinguishable from columbarius, but dorsally 

 it is about as dark as examples of immature suckleyi from Vancouver 

 Island. On the whole, it is best referred to columbarius. 



Falco sparverius sparverius Linnaeus. American Sparrow Hawk 

 Seen from time to time in the vicinity of Telegraph Greek, gen- 

 erally not far from the river. There were probably several pairs nest- 

 ing within a few miles of the town. At Doch-da-on Creek, in July, 



