A small vireo with yellow throat.

§ Quick facts

SizeBody 11–15 cm (4.3–5.9 in); wingspan 18–25 cm
Weight10–18 g
LifespanWild 3–8 years
OrderPasseriformes
FamilyVireonidae

§ Encyclopedia

The Philadelphia vireo is a small North American songbird in the vireo family (Vireonidae). "Vireo" is a Latin word referring to a green migratory bird, perhaps the female golden oriole, possibly the European greenfinch. The specific philadelphicus is for the city of Philadelphia.

Source: Wikipedia — Philadelphia vireo Licensed under CC BY-SA 4.0

§ Identification

Field marks. Olive above with a gray crown, dark eye line, white eyebrow, and a distinctive yellow wash strongest on the throat and center of the breast. No wing bars.

Similar species. Warbling Vireo is whiter below with a paler face; Tennessee Warbler is slimmer with a thinner bill. The yellow-centered underparts mark Philadelphia.

Voice. A song like a slow Red-eyed Vireo — deliberate, slurred phrases, but higher and slower.

§ Diet & behavior

Diet. Caterpillars and other insects, occasional berries.

Behavior. A canopy vireo of northern second-growth woods; forages deliberately like other vireos and is easily confused with the much commoner Warbling Vireo.

§ Range

Boreal Canada in summer

§ Habitat

Mixed forests

§ Threats

Boreal forest loss.

§ Conservation status

According to the IUCN Red List, the philadelphia vireo is currently classified as Least Concern.

§ What helps

Support boreal conservation.

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§ Further reading

§ Sources cited

  • Cornell Lab of Ornithology — All About Birds
  • National Audubon Society
  • iNaturalist
  • IUCN Red List