[47 6 ] BIRDS OF OREGON 



Olive-backed Thrush: 



Hylocichla ustulata sivainsoni (Tschudi) 



DESCRIPTION. "Upper parts uniform olive or grayish olive; buffy eye ring conspicuous; 

 sides of head buffy, marked with darker; chest bright buff, marked with wide blackish 

 streaks; under parts white, sides olive brown. Length: 6.35-7.55, wing 3.80-4.10, 

 tail 1.80-3.10, bill .50-. 55." (Bailey) Nest and eggs: Similar to those of Russet- 

 backed Thrush. 



DISTRIBUTION. General: Breeds from northern Alaska, Mackenzie, Manitoba, 

 Quebec, and Newfoundland south to Kenai Peninsula, eastern Oregon, northern 

 California, Nevada, Utah, Colorado, Michigan, West Virginia, and Pennsylvania. 

 Winters in Central and South America. In Oregon: Fairly common summer resident 

 of eastern Oregon, including Blue Mountains, Steens, and higher peaks in Malheur 

 County. 



JEWETT (19090) published the first record of the Olive-backed Thrush 

 from notes and specimens taken on Eagle Creek, Baker County, in 1906. 

 He found eight nests between June Z3 and July 7 in that locality. Of 

 these, one contained three eggs; six, four eggs; and one, five eggs. Peck 

 (191 1 a) published the only other record for the State, from Willow Creek 

 in northern Malheur County. Our records extend from May 13 to Sep- 

 tember ii (both Baker County). 



There are several Oregon specimens in the Biological Survey collection. 

 Preble, on his trip in 1915, took specimens at Disaster Peak on June 15, 

 and in Jordan Valley on June ~L^ and July i. There is a skin from Cornu- 

 copia, collected by Jewett, September z, 1915. Becker took the species in 

 Kiger Gorge in the Steens Mountains during his stay from August 10 to 

 September 4, 1916. There are skins in the Jewett collection from Billy 

 Meadows (June 13, 192.5), West Fork of the Wallowa River (July 2.1, 

 1915), Lick Creek Ranger Station (July 17, 1916), and Lostine River 

 (July 18, 192.6), all in Wallowa County. Gabrielson has one skin taken 

 June 8, 1934, from just across the State line between Wallowa County 

 and Washington. These specimens establish a definite breeding range 

 that at present includes Wallowa, Baker, Malheur, and Harney Counties. 

 We would expect the species to be found eventually in Grant, Union, 

 Umatilla, and probably Lake Counties. In connection with the latter 

 county, a note in the Biological Survey files tells of a bird sent to the 

 Biological Survey and identified by A. K. Fisher as this species. It came 

 from the Warner Mountains, August 4, 1896, but we have not been able 

 to trace it farther. 



Willow Thrush: 



Hylocichla fuscescens salicicola Ridgway 



DESCRIPTION.- "Upper parts uniform olive brown, chest pale buffy, marked with tri- 

 angular brown spots; median under parts white, sides gray. Length: 6.90-7.90, 



