• Skip to Content
  • Skip to Main Navigation
  • Skip to Local Navigation
  • Skip to Search
  • Skip to Sitemap
  • Skip to Footer
Help develop a Bird ID tool!

Cassin's Vireo

Vireo cassinii ORDER: PASSERIFORMES FAMILY: VIREONIDAE

IUCN Conservation Status: Least Concern

A common bird of the far western forests, the Cassin's Vireo is conspicuous for its constant singing. Formerly lumped as a "Solitary Vireo" with the Plumbeous and Blue-headed vireos, it is now considered a separate species.

Birds of North America Online
Optics Planet birding kit

Appearance

Warblerlike
Warblerlike
Typical Voice

Adult Description

  • Small songbird, medium-sized vireo.
  • Brownish-gray head with white spectacles.
  • Two whitish wingbars.
  • Belly white, flanks yellowish.

Immature Description

Immatures similar to adults, but crown and sides of head more olive.

Range Map Help

Cassin
View dynamic map of eBird sightings

Field MarksHelp

Similar Species

  • Blue-headed Vireo is very similar, but has blue-gray crown contrasting more sharply with throat and the back; very limited overlap in range.
  • Plumbeous Vireo is gray over all upperparts, with only the rump having any greenish, the edging of flight feathers are not yellow, and the flanks have little or no yellow.
  • Hutton's Vireo is smaller, eyering is incomplete, has dingier underparts, and less contrasting plumage.
  • Bell's Vireo lacks a full eyering so does not appear spectacled, has weaker wingbars, and does not appear so contrasting.