WOOD WARBLERS: Family Compsothlypidae [ 499 ] 



sure that more field work would add greatly to our knowledge of the 

 extent of territory occupied by this little midget. It appears in April 

 (earliest date, April 9, Sherman County) and remains until August (latest 

 date, August 2.1, Baker County). 



Little has appeared in literature regarding this rather inconspicuous 

 bird of the oak- and brush-covered slopes. Sharpe (1885) listed a speci- 

 men from Upper Klamath Lake on May 18. Merrill (1888) considered it 

 common at Fort Klamath, but it was not again mentioned in Oregon 

 ornithological literature until Jewett (1909^ published his records from 

 Baker County. Jewett (191 6a) later listed it from Baker and Sherman 

 Counties. Walker (1917) referred to the Sherman County bird men- 

 tioned above, and the authors (Jewett and Gabrielson 192.9) included 

 several records from the Portland area. Gabrielson (1931) considered it 

 common in the Rogue River Valley and recorded the only nesting record 

 so far published for the State, a nest found at Gold Hill, Jackson County, 

 May 1 6, 1916, by Jewett. It was located on the upper bank of an old 

 roadway in the timber, well sunk into the ground and concealed from 

 above by a small plant of poison oak. Both parents were present, and 

 the female and a set of five well-incubated eggs were collected. Patterson 

 (ms.) reported two nests at Pinehurst, May 2.0, 192.0, and May 2.3, 192.8. 



Eastern Yellow Warbler: 



Dendroica aestiva aestiva (Gmelin) 



DESCRIPTION. "Adult male: Under parts yellow; breast and belly streaked with rufous; 

 forehead bright yellow, front of crown often tinged with orange; hind neck and 

 rest of upper parts yellowish green, brightest on rump; wing edgings yellow; inner 

 webs of tail feathers, except middle pair, light yellow. Adult female and male in first 

 autumn: upper parts plain yellowish green, usually darker than in male, lighter on 

 forehead and rump; under parts paler and duller, usually unstreaked. Young female 

 in first autumn: like adult female, but duller olive green above, olive whitish slightly 

 tinged with yellow below; under tail coverts pale yellow. Male: length (skins) 

 3.94-4.91, wing 1.36-1.80, tail 1.65-1.09, bill .39-. 43. Female: length (skins) 4.01- 

 4.57, wing 1.14-1.68, tail 1.54-1.77, bill .39-. 43." (Bailey) Nest: A compact cup 

 of gray plant fibers, lined with down and feathers and placed in a fork in a bush or 

 tree. Eggs: 2. to 6, greenish white, wreathed with brown, black, and lilac spots 

 about large end. 



DISTRIBUTION. General: Breeds throughout North America from tree limit south to 

 Nevada, New Mexico, southern Missouri, northern Alabama, Georgia, and South 

 Carolina. Winters in South America. In Oregon: Abundant summer resident 

 throughout State. 



THERE HAS BEEN much confusion of the races of Yellow Warbler in Oregon. 

 We have a fair series of breeding birds from the different sections of the 

 State, and after a careful comparison we are unable to find any constant 

 character or combination of characters either of size or coloration by 

 which we are able to differentiate the two forms. The 1931 A. O. U. 

 Check-List includes the birds west of the Cascades in the race D. a. 



