The Brown-capped Vireo, Vireo leucophrys, is a small passerine

Passerine

A passerine is a bird of the order Passeriformes, which includes more than half of all bird species. Sometimes known as perching birds or, less accurately, as songbirds, the passerines form one of the most diverse terrestrial vertebrate orders: with over 5,000 identified species, it has roughly...

 bird

Bird

Birds are feathered, winged, bipedal, endothermic , egg-laying, vertebrate animals. Around 10,000 living species and 188 families makes them the most speciose class of tetrapod vertebrates. They inhabit ecosystems across the globe, from the Arctic to the Antarctic. Extant birds range in size from...

. It breeds in highlands from southern Mexico

Mexico

The United Mexican States , commonly known as Mexico , is a federal constitutional republic in North America. It is bordered on the north by the United States; on the south and west by the Pacific Ocean; on the southeast by Guatemala, Belize, and the Caribbean Sea; and on the east by the Gulf of...

 south to northwestern Bolivia

Bolivia

Bolivia officially known as Plurinational State of Bolivia , is a landlocked country in central South America. It is the poorest country in South America...

. It is sometimes considered to be conspecific with the similar Warbling Vireo

Warbling Vireo

The Warbling Vireo, Vireo gilvus, is a small North American songbird.Its breeding habitat is open deciduous and mixed woods from Alaska to Mexico and the Florida Panhandle. It often nests along streams. It migrates to Mexico and Central America....

.

The adult Brown-capped Vireo is 12-12.7 cm in length and weighs 12 g. It has olive-green upperparts and a brown crown. There is a brown line from the bill through the eyes, and a white supercilium

Supercilium

The supercilium is a plumage feature found on the heads of some bird species. It is a stripe which runs from the base of the bird's beak above its eye, finishing somewhere towards the rear of the bird's head. Also known as an "eyebrow", it is distinct from the eyestripe, which is a line which runs...

. The face and throat are off-white, and the underparts are otherwise yellow with some olive on the flanks. Young birds are buff-brown above with a weaker supercilium.

The Brown-capped Vireo has a sharp twiist call and the song is a rich warbled here you see me hear me sing so sweet, reminiscent of that of Warbling Vireo.

This vireo

Vireo

The vireos are a group of small to medium-sized passerine birds restricted to the New World. They are typically dull-plumaged and greenish in color, the smaller species resembling wood warblers apart from their heavier bills...

 occurs in the canopy and middle levels of light woodland, the edges of forest, and other semi-open habitats at altitudes from 500 to 2500 m. Brown-capped Vireos feed on caterpillar

Caterpillar

Caterpillars are the larval form of members of the order Lepidoptera . They are mostly herbivorous in food habit, although some species are insectivorous. Caterpillars are voracious feeders and many of them are considered to be pests in agriculture...

s and other insect

Insect

Insects are a class of living creatures within the arthropods that have a chitinous exoskeleton, a three-part body , three pairs of jointed legs, compound eyes, and two antennae...

s gleaned

Gleaning (birds)

Gleaning is a term for a feeding strategy by birds in which they catch invertebrate prey, mainly arthropods, by plucking them from foliage or the ground, from crevices such as rock faces and under the eaves of houses, or even, as in the case of ticks and lice, from living animals. This behavior is...

 from tree foliage. They also eat small fruits. They will join mixed-species feeding flock

Mixed-species feeding flock

A mixed-species feeding flock, also termed a mixed-species foraging flock, mixed hunting party or informally bird wave, is a flock of usually insectivorous birds of different species, that join each other and move together while foraging...

s.

The nest is undescribed.