Philadelphia Vireo (Vireo philadelphicus)

Philadelphia Vireo

[order] PASSERIFORMES | [family] Vireonidae | [latin] Vireo philadelphicus | [UK] Philadelphia Vireo | [FR] Vireo de Philadelphia | [DE] Schlichtvireo | [ES] Vireo de Filadelfia | [NL] Philadelphia-vireo


Monotypic species

Physical charateristics

Medium-sized vireo with olive-green upperparts and yellow-washed to yellow underparts. Head has a gray cap, dark eyes, and white-bordered black eye-line. Wings are olive-green with very faint wing-bars. Undertail coverts yellow. Sexes are similar.

Listen to the sound of Philadelphia Vireo

[audio: Vireo.mp3]

Copyright remark: Most sounds derived from xeno-canto

wingspan min.: 20 cm wingspan max.: 23 cm
size min.: 12 cm size max.: 13 cm
incubation min.: 12 days incubation max.: 14 days
fledging min.: 0 days fledging max.: 14 days
broods: 1   eggs min.: 3  
      eggs max.: 5  


North America : North


Breeds in early and mid-successional deciduous woods and parklands, especially among aspens, birches, alders, and ashes.


Three to five white eggs with brown and black speckles at larger end are laid in a nest made of grass, moss, lichens, and plant down, and hung by spider silk and insect webbing. Incubation ranges from 12 to 14 days and is carried out by both parents.

Feeding habits

Philadelphia Vireo: Eats mostly insects, some fruits, and berries. Forages slow and deliberately in low to mid-level vegetation, often hanging upside down to pick off insects; sometimes forages while hovering.


This species has an extremely large range, and hence does not approach the thresholds for Vulnerable under the range size criterion (Extent of Occurrence <20,000 km2 combined with a declining or fluctuating range size, habitat extent/quality, or population size and a small number of locations or severe fragmentation). The population trend appears to be increasing, and hence the species does not approach the thresholds for Vulnerable under the population trend criterion (>30% decline over ten years or three generations). The population size is extremely large, and hence does not approach the thresholds for Vulnerable under the population size criterion (<10,000 mature individuals with a continuing decline estimated to be >10% in ten years or three generations, or with a specified population structure). For these reasons the species is evaluated as Least Concern.
The Philadelphia Vireo has a very large range, reaching up to 2,700,000 kilometers. This bird can be found in the United States, Canada, Mexico, the Bahamas, Belize, Bermuda, Cayman Islands, Colombia, Costa Rica, Cuba, El Salvador, Guatemala, Honduras, Nicaragua, Panama, Saint Pierre, and the Turks and Caicos Islands among others. It prefers forested areas or degraded forests. The global population of this bird is estimated to be around 4,300,000 individuals
Philadelphia Vireo status Least Concern


Breeds from northeastern British Columbia across Canada to New Brunswick, and in very northern tier of United States. Winters from se Mexico s through C. America to Panama and n Colombia. Vagrant to British Isles and w U.S.; has wintered in California.

Distribution map

Philadelphia Vireo distribution range map

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