Streak-crowned Antvireo

The streak-crowned antvireo is 10 to 11 cm (3.9 to 4.3 in) long and weighs 15 to 17 g (0.53 to 0.60 oz). Adult males have a dark gray forehead, crown, and nape with heavy grayish white streaking. Their ear coverts are blackish. Their upperparts are grayish olive with a hidden white patch between the scapulars. Their flight feathers are dark grayish olive with wide buffy grayish edges; their wing coverts are blackish with white tips. Their tail is dark grayish olive with narrow white tips on the feathers. Their throat and breast are white with prominent dark streaks, their sides olive-gray, their belly whitish, and their undertail coverts whitish with a yellowish tinge. Adult females have a rufous crown and nape with dark spots. Their wing coverts are less black than the male's and their breast and flanks are ochraceous. Subadult males resemble adult females but with grayer upperparts and whiter underparts.

The streak-crowned antvireo is found from extreme southeastern Honduras along the Caribbean slope through Nicaragua and most of Costa Rica, and also across northern Costa Rica into Guanacaste Province. It primarily inhabits the understorey to mid-storey of evergreen forest in the lowlands and foothills, and much less frequently is found in mature secondary forest. In elevation it ranges from sea level to 400 m (1,300 ft) in Honduras and to 800 m (2,600 ft) in Nicaragua and Costa Rica.

The streak-crowned antvireo feeds mostly on insects and its diet also includes other arthropods like spiders. It usually forages singly or in pairs, and usually as part of a mixed-species feeding flock. It typically feeds between about 1.5 and 8 m (5 and 25 ft) above the ground. It feeds deliberately, generally by gleaning while perched from live foliage, vines, stems, and thin branches. It often makes short sallies to hover-glean or to snatch prey from overhanging leaves.