vireo

vireo Any of a number of small insectivorous passerine birds, of the genus Vireo, that have grey-green plumage.
1998, Sally Roth, Attracting Birds to Your Backyard, https://books.google.com.au/books?id=9qRwDxtxvFsC&pg=PA257&dq=%22vireo%22%7C%22vireos%22&hl=en&sa=X&ei=olg_Vev4JYHImAWxi4DwAw&redir_esc=yv=onepage&q=%22vireo%22%7C%22vireos%22&f=false page 257,

The voices of male vireos are a constant in the spring woodland, providing background music to the longer, prettier songs of tanagers and thrushes. Vireos tend to sing in bursts interrupted by short or long pauses.

Uniquely American, the vireos are a group of some 46 foliage-gleaning forest birds with uncertain family connections. Vireo species are about equally divided between North and South America, with one, the Black-whiskered Vireo, largely restricted to the West Indies. Several vireos make long migratory journeys; all are nocturnal migrants.

Thisthe white-eyed vireo is our only vireo that has two white wing bars, yellow spectacles, and yellow sides.

Family Vireonidae

Vireos

The vireos are slim grayish green birds that stay high up in the trees most of the time.