orT.,i90().] BIRDS OF THE YUKON REGION. 81 



Yukon, heard several at Hendricks Station August 25, and saw one at 

 St. Michael September 18. 



Adults had completed the sunnuer molt ])y July 20; the young were 

 in full juvenile plumage on June 20, and in tirst winter plumage on 

 August 20. The molt is complete in the adults, while in the young 

 the Avings and tail remain unchanged. 



The adults collected are all intermediate between capitaJh and 

 fianifronsj each has a black orbital ring, but this is broader in those 

 from Circle. All those in juvenile plumage have the head dull plum- 

 beous, like the l)ack, as mfuinifrons. 



109. Corvus corax principalis. Northern Raven. 



Of all the birds we met the raven occurred most regularly. On 

 our entire trip down the Yukon hardh^ a day passed without our see- 

 ing the birds in twos and threes. We saw a few at AVrangcll, found 

 them more common at Wrangell Narrows, saw several at Skagway, 

 and noticed the wing of one at Glacier. A few were noted across 

 White Pass at Middle Lake and they were abundant at Log Cal)in. 

 A flock of at least 200 was observed at the latter place Juno 20, and 

 another of 50 at Bennett two days later. During September at St. 

 Michael we saw them frequenth, but never in large numbers. At 

 Unalaska they were abundant and remarkably tame. 



An adult taken on June 20 is in full molt; a young taken July 22 

 is in juvenile plumage; on one taken August 28 the body feathers of 

 the lirst winter plumage have replaced most of the juvenile, and the 

 change is complete in one taken September 9. 



[tWvus atnericanus. American Crow. I was .told by one of the 

 prospectors whom I met on a Yukon steamer that the crow, as well as 

 the northern raven, occurs at the head waters of the Porcupine.] 



110. Corvus caurinus. Northwest Crow. 



Common on ' Eagle Island ' at Bocadequadra, where Osgood found 

 a linished but empty nest May 28. Crows were ver}^ common near 

 Vancouver June 26, but we saw none after leaving Bocadequadra. 



111. Scolecophagus carolinus. Rusty Blackbird. 



Two blackbirds which I saw at Log Cabin June 15 were probably 

 this species, and 1 was told that rusty blackbirds had been abundant 

 there a few days before our visit. 



Osgood took a specimen near Fort Yukon August 21, and I saw a 

 small flock at the Aphoon mouth August 28. I was informed that 

 these birds breed in large numbers on the tundra by the Kuskokwim 

 and at the head of the Porcupine. 



YCrxx'otJiraustes vesjyertinus rnoiitanii-^. Western Evening Groslieak. 

 A prospector told me that a grosbeak, whose description answered 

 4494— No. 19 6 



