[ 496 ] BIRDSOFOREGON 



Mackenzie, and central Alberta south to Lower California and Mexico and central 

 western Texas. Winters south to Central America. In Oregon: Common summer 

 resident and breeding species of wooded areas. 



THE WESTERN WARBLING VIREO (Plate 84, B*) is the most common and 

 widely distributed vireo in the State. It is much more often heard than 

 seen, as its soft colors blend into the foliage until it is indeed difficult to 

 distinguish. Since Bendire (1877) first discovered it in Oregon at Camp 

 Harney it has been listed by many writers from all sections. It is equally 

 abundant on the stream bottoms in eastern and western Oregon, except 

 on the coast, where it is a decidedly less conspicuous element of the fauna. 

 It has been recorded, however, from practically every county. It arrives 

 in May and remains until September (earliest date, April 2.1; latest, 

 October i, both Multnomah County). Its somewhat monotonous song, 

 repeated endlessly through the long summer days as the birds work 

 through the leafy treetops, is heard everywhere throughout June and 

 July, even at midday, when the balance of the bird chorus is stilled. 

 After the nesting season, however, the singing ceases and the birds 

 become silent shadows that slip about in the treetops so quietly that 

 they are seldom seen. 



The eggs are most commonly laid in May and June, and the young are 

 on the wing by July i. Our nesting data are rather scanty, but Jewett 

 has a Portland record for May 16, 1917, of a nest and four fresh eggs, 12. 

 feet up in an alder tree. Together we found a nest near Fort Klamath, 

 May 30, 1934, in an aspen thicket. It contained three fresh eggs. Patterson 

 (ms.) has egg dates on May 2.0 and 2.5 at Pinehurst and June 2.0 and 2.7 

 on Williamson River in Klamath County. 



Wood Warblers: Family Compsothlypidae 



Orange-crowned Warbler: 



Vermivora eel at a eel at a (Say) 



DESCRIPTION. "Adult male: Upper parts dull olive green, brighter on rump; some- 

 times tinged with gray, especially on head; crown with dull orange patch concealed 

 except in worn midsummer plumage by grayish olive tips to feathers; orbital ring 

 and superciliary yellow; under parts dull yellowish, indistinctly streaked with 

 darker on throat and chest. Adult female: crown patch usually duller and restricted, 

 sometimes obsolete. Young: generally without crown patch. Young in first plumage: 

 crown patch wanting; upper parts dull olive; wings with two light bands; belly 

 white; rest of under parts brownish gray, tinged with buffy. Male: length (skins) 

 4.2.5-4.80, wing z. 39-2.. 49, tail i.9z-z.c>7, bill .37-. 41. Female: length (skins) 

 4.35-4.65, wing z.z6-z_33, tail 1.78-1.94, bill .37-. 41." (Bailey) Nest: On the 

 ground, made of strips of bark, stems, and grasses, and lined with grass, hair, or fur. 

 Eggs: 4 to 6, white, finely speckled with brown, mostly on larger end. 

 DISTRIBUTION. General: Breeds from Kobuk River, Alaska, south to northern 



