An unmarked vireo, the warbling is most often located by its song, which it delivers for hours. The birds tend to work mid and top parts of broad, leafy trees. Polytypic. Length 5.5". Among the ...

A shy, secretive, and silver-tongued songbird, the tenacious least Bell's vireo has been to the brink of extinction and back in recent decades. Although it is federally protected and there has been an ...