Warbling Vireo, Eugene, OR
This Warbling Vireo was in the boat launch area at Merrill Lake, Cowlitz County, Washington on 9 July 2011.
This Warbling Vireo was along Scoggins Valley Rd. southwest of Forest Grove, Washington County, Oregon on 20 May 2012.
Adult Warbling Vireo at Indian Ford C.G., Deschutes Co., Oregon on 7 July 2012.
Warbling Vireo with nesting material (?), Cold Springs Campground, June 13,2013
Warbling Vireo at Nest, Cold Springs Campground, June 13, 2013
This adult Warbling Vireo (right) was feeding a begging juvenile (left) near Hinkey Summit on 14 June 2014. Warbling Vireos were common to abundant anywhere there were stands of bigger cottonwoods and aspens.
Depending on lighting conditions, Warbling Vireos can be quite variable in how patterned their heads look. They may appear to have dark lores and very strong contrast between the cap and supercilium when in the shade. Birds of this appearance are sometimes misidentified as Philadelphia Vireos. Philly Vireos are always much yellower on the breast and vent than this bird and they tend to look more compact with a shorter tail and a stubbier bill. Further, as pointed out by Sibley and others, the black in the lores flares to meet the front of the eye, with the dark being as broad as the height of the eye. On this bird, the apparent dark in the lores does not flare much and is less than the height of the eye at its broadest point.
This Warbling Vireo was at Malheur NWR headquarters on 23 May 2015. Note the rather blunt-tipped bill, diffuse pale supercilicum and somewhat plain unmarked lores.