106 University of California Publications in Zoology. [Vol. 7 



above, as compared with the paler backed juvenals of montana 

 from the Prince William Sound region. 



Sitta canadensis Linnaeus. Red-breasted Nuthatch. 



A single bird, seen, but not secured, by Hasselborg, at Egg 

 Harbor, Coronation Island, on May 17, was the only one of the 

 species observed on any of the islands. It was not again met 

 with until September, on the Taka River, where it was 

 fairly common, though irregularly so, many individuals being 

 seen in the flocks of migrating warblers and kinglets. Six 

 specimens were shot at this point, two male and three female 

 immatures in complete first winter plumage (nos. 9381-9385), 

 and one adult female, also in perfect winter plumage (no. 9380). 

 The adult differs from the young females in having the top and 

 sides of the head dull black, in marked contrast to the slate- 

 blue dorsum. In the immatures the head is concolor with the 

 back. The two immature males have the pileum glossy black, 

 apparently not differing from the adult males in any respect. 



Penthestes rufescens rufescens (Townsend). 

 Chestnut-backed Chickadee. 

 Quite generally distributed, and fairly common, as land birds 

 go in this region. On Kupreanof Island, upon our arrival early 

 in April, the species was not common, but was becoming more 

 so daily. On Kuiu it was decidedly scarce. On Prince of Wales 

 Island some were seen at e^ry point visited. Port Protection, 

 Calder Bay, San Alberto Bay, and Klawak, but they were 

 nowhere at all common. On Coronation Island (May 14 to 18) 

 a number were seen, some in small flocks, but many in pairs; 

 the latter strongly resented our appearance, and probably had 

 nests somewhere near by. On Warren Island also they were 

 quite numerous, and all in pairs. A few were observed at all 

 the points touched on Dall Island, and on Duke Island. On 

 the Chickamin River and Portage Cove, Revillagigedo Island, 

 they were not common. The first young were observed flying 

 about on Etolin Island, July 11, several broods being observed. 

 They were scarce at Bradfield Canal and on Zarembo Island, 

 but on I\Iitkof Island, Thomas Bay and Port Snettisham, many 



