0 the philadelphia vireo (vireo philadelphicus) is a small north american songbird in the vireo family (vireonidae) .
1  "vireo" is a latin word referring to a green migratory bird , perhaps the female golden oriole , possibly the european greenfinch .
2  the specific philadelphicus is for the city of philadelphia .
3 adults are mainly olive-brown on the upperparts with yellow underparts; they have dark eyes and a grey crown .
4  they have no wing bars and no eye ring .
5  there is a dark line through the eyes and a white stripe just over them .
6  they have thick blue-grey legs and a stout bill .
7  the philadelphia vireo is similar in appearance to the warbling vireo , but can be reliably distinguished by having much yellower underparts , and dark lores .
8 their breeding habitat is the edges of deciduous and mixed woods across canada .
9  they make a basket-shaped cup nest in a fork of a tree branch , usually placed relatively high .
10  the female lays 3 to 5 lightly spotted white eggs .
11  incubation , by both parents , lasts up to 14 days .
12 these birds migrate to mexico and central america .
13  this vireo is a very rare vagrant to western europe .
14  they are unlikely to visit philadelphia , except in migration .
15 they forage for insects in trees , sometimes hovering or flying to catch insects in flight .
16  they also eat berries , especially before migration .
17 the songs and calls of philadelphia vireo are three to five notes , weeezh weeezh weeezh , very similar to those of the red-eyed vireo .
