Perching Birds Chiefly Brown or Streaked 



757. Gray-cheeked Thpuah [Hyiockhla alicm). L. 

 7.5; W. 4- '^ds. Tail and back the saiii^ color, olive 

 without brownish tinge; eye-ring and lores whitish, 

 cheeks and breast only slightly tinged with buff, breast 

 with wedge-shaped spots. NoUs. Doubtless like 

 those of No. 757a. 



Range. — Breeds In Labrador ana west to Alaska: migrates through 

 eastern Nonh America and winters In Ceniral America. 



757a. Bicknell Thrush (W. a. bicknelli). Similar 

 to No. 757, but smaller, L. 7; W. 3.5. Notes. Calls, 

 ^m like that of Veety; a low duck like that of Hermit 

 Thrush, and rarely, a pip or ^fmA like that of Olive- 

 backed Thrush; song, like that of Veery but more in- 

 terrupted. (Brewster.) 



Range.— Breeds In the high parts of the Catsklllls and north to 

 Wliltif Muuiitaiii!) and Nova Scotia; winters In tropics. 



758. Russet-backed Thrush iHylodchla ustulata). 

 L. 7,2; W. 4. Tail not decidedly more rufous than 

 back. j4ds. Eye-ring, cheeks, sides of neck and 

 breast distinctly buffy\ breast with wedge-shaped spots; 

 back and flanks olive-brc.vn; tail slightly browner. 

 The most deeply colored bird of the ustulala group. 



Range. — Pacific coast; 

 iOulh to GuatemaU. 



breeds from Oregon to Alaska; winters 



7 58a. Olive-backed Thrush [H. u. s-xainsonii). 

 Similar to No. 758, but back, tail, and flanks without 

 brownish or rufescent tinge. Notes. Call, a liquid 

 putt; song, suggesting both that of Hermit Thrush and 

 the Veery. 



Rang*. — Eastern North America; hreeds In Alleghanles from Penn- 

 sylvania and the Catskilis, north to New Brunswick and Manitoba; 

 'Winters In Central and Soulli America. 



758b. California Olive-backed Thrush {H. u. 



tedica). Differs from 758 and 758a, in more rufescent 

 coloration on the flanks; sides and upper' surface 

 usually paler than No. 758, COberholser.) 



Range.— Ca.llforn(a. except north coast; north In Interior to southei n 

 Oregon; south, in winter to Arizona and southern Mexico. (Ober- 

 bolser. ) 



758c. Alma Thrush (H. u. almxe). Similar to No. 

 758a, but back and flank.s grayer. The palest bird of 

 the ustulata group. 



Range. — Alaska, eifcciit Yukon Bssin, south In Rocky Mountain 

 region, and west to Utah and eastern Nevn'^" '*- O. U.J 



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