Nature Journal
with Photos

Philadelphia Vireo Identification Tips
(Credit: U. S. Geological Survey)
General Information
- Thick bill with hooked upper mandible
- Sexes similar
- Dark eye
- Bold white supercilium offset by dark eyeline but
  without dark stripe above
- Dark lores
- Olive upperparts
- Yellow underparts, most concentrated on breast
- No wing bars
- Blue-gray legs

Similar Species
Members of the Red-eyed Vireo complex have bolder supercilia that are bordered above (and below) by black stripes, red eyes as adults, and mostly white underparts.

Warbling Vireo is very similar, especially fall immatures which can have quite yellow underparts. Note the pale lores of Warbling Vireo and the tendency for any yellow to be concentrated on the belly and flanks rather than the breast. Tennessee Warbler is quite similar but has a thinner pointed bill. All other vireos have wing bars.
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