Brown-headed Greenlet

The brown-headed greenlet is about 11 to 12 cm (4.3 to 4.7 in) long and weighs 8 to 11.5 g (0.28 to 0.41 oz). The sexes have the same plumage. Adults have a brown or dull sepia crown with a slight yellowish wash. Their face is dull brownish. Their upperparts and tail are olive-green. Their wing's primaries and secondaries are dark grayish with thin greenish olive edges on their outer webs. Their throat and upper breast are dirty white with an olive-buff tinge. Their lower breast and belly are gray-white, their flanks yellowish, and their vent pale greenish yellow. They have a gray or whitish iris, a brown maxilla, a pinkish mandible, and pink legs and feet.

The brown-head greenlet is found from eastern Colombia east across most of southern Venezuela's Amazonas state and southeast into Brazil to the Negro River near Manaus. It inhabits scrubby low-stature forest on sandy soils, woodlands in savanna, blackwater river areas, and the edges of várzea forest. In elevation it reaches 400 m (1,300 ft) in Brazil and Colombia and at least 200 m (700 ft) in Venezuela.

The brown-headed greenlet's diet has not been detailed but is known to include caterpillars and adult insects. It forages in pairs and family groups and sometimes joins mixed-species feeding flocks. It takes food while actively foraging among leaves, sometimes hanging upside-down to reach it, and also sometimes briefly hovers to capture it from the undersides of leaves. It typically forages between about 5 and 12 m (15 and 40 ft) above the ground.