Cassin's Vireo

The vireo is 11–14 cm in length, with a gray head, back, and flanks, and whitish underparts. It has solid white spectacles and white wing bars.

The Cassin's Vireo is classified as Least Concern. Does not qualify for a more at risk category. Widespread and abundant taxa are included in this category.

Cassin's Vireo is now one of three separate species. Cassin's Vireos are olive above and whitish below, with a yellowish wash on their sides and flanks, white throats, and gray heads. They have two white wing-bars and distinctive white eye-rings that extend to the brow, making the birds look as if they are wearing spectacles. More

Cassin's Vireo (Vireo cassinii) is a small North American songbird, ranging from southern British Columbia in Canada through the western coastal states of the United States. This bird migrates, spending the winter from southern Arizona (the Sonoran Desert) to southern Mexico. The vireo is 11–14 cm (4–6 inches) in length, with a gray head, back, and flanks, and whitish underparts. It has solid white "spectacles" and white wing bars. More

The Cassin's Vireo is native to the United States, Mexico, Guatemala and Canada. This terrestrial bird has a fairly large range of nearly 1.5 million square kilometers within its natural range. The population of Cassin's Vireo is more than 4 million individual birds. In 2000, Cassin's Vireo was rated as Lower Risk; however, this was downgraded to a Lest Concern rating due to its large population and lack of evidence that the population has decreased over the past generations. More

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. More

The Cassin's Vireo (Vireo cassinii) was formerly known as the Solitary Vireo and was recently split into three separate species by American ornithologists: Cassin's, Plumbeous, and Blue-headed Vireos. The Cassin's Vireo occupies the westernmost part of the former Solitary Vireo's range, stretching from British Columbia and southwestern Alberta through central Idaho, across to coastal Washington and Oregon, south to southern California. This bird migrates for the winter months from southern Arizona to southern Mexico. More

Bent Life History for the Cassin's Vireo - the common name and sub-species reflect the nomenclature in use at the time the description was written. CASSIN'S VIREO VIREO SOLITARIUS CASSINI Xantus HABITS Cassin's vireo is the westernmost race of the species, breeding from the Rocky Mountains westward and mainly in the Transition Zone, from central British Columbia to northern Lower California. It differs from the eastern blue-headed vireo in being slightly smaller and much duller in color. More

Cassin's Vireo builds a cup nest out of bark strips and down in the fork of a twig. It lays 2 to 5 white eggs with some brown spots. This species was formerly considered to belong to the same species as Plumbeous Vireo and Blue-headed Vireo. At that time, this complex of species was referred to as the "Solitary Vireo". This vireo is named after ornithologist John Cassin. This bird-related article is a stub. More

Cassin's Vireo nests in forests in and west of the Cascade Range and Sierra Nevada, extending east into Idaho and western Montana. Toward the south it becomes more and more restricted to higher elevations, in Baja California breeding only in the Sierra San Pedro M More

The Cassin's Vireo, the Plumbeous Vireo and the Blue-headed Vireo were formerly considered a single species known as the Solitary Vireo. The Cassin's Vireo occupies the westernmost part of the former Solitary Vireo's range. It breeds from British Columbia and southwestern Alberta south to central Idaho and along the West Coast to southern California. Most leave the U.S. in the fall but a small number overwinter in southeastern Arizona. It prefers coniferous and mixed forests. More

Order : Passeriformes
Family : Vireonidae
Genus : Vireo
Species : cassinii
Authority : Xántus de Vesey, 1858