Blue Mountain Vireo

The Blue Mountain vireo is 12.5 to 15 cm (4.9 to 5.9 in) long and weighs about 20 to 22 g (0.71 to 0.78 oz). This is a rather robust vireo. The sexes have the same plumage. Adults have a mostly gray-brown head with a plain face and yellow-tinged off-white chin and throat. Their upperparts are gray-brown with an olive tinge from the middle of the back to the rump. Their primaries and secondaries are gray-brown with grayish green edges on the outer webs. Their rectrices are gray-brown with greenish edges on the outer webs. Voice: The Blue Mountain vireo's song is a "rilling or bubbling whistle, descending slightly in tone" and its call a "harsh burr, descending at end".