Basileuterus tristriatus
The Three-striped Warbler (Basileuterus tristriatus) is a vibrant and active passerine, measuring approximately 12.5-13.5 cm (5 inches) in length and weighing around 11-13 grams. Its most striking feature, lending to its common name, is the boldly patterned head: a broad, bright yellow supercilium contrasts sharply with a black lateral crown stripe and a central yellow crown stripe, flanked by a prominent black eyestripe. The upperparts are a uniform olive-green, while the underparts are brig...
This species primarily inhabits humid montane forests, cloud forests, and dense secondary growth, typically at elevations ranging from 700 to 2,500 meters, occasionally lower or higher depending on the region.
Predominantly insectivorous, the Three-striped Warbler primarily consumes small arthropods, including beetles, caterpillars, spiders, and flies, gleaned actively from leaves, twigs, and bark.
The Three-striped Warbler is a highly active and arboreal insectivore, foraging restlessly through the understory and mid-story of its forest habitat. It is a key member of mixed-species foraging flocks, often acting as a nuclear species or an active participant, moving quickly and gleaning insec...
The Three-striped Warbler is a widespread resident species distributed across Central and South America, with a highly disjunct distribution. Its range extends from southern Costa Rica and Panama, through the Andes Mountains of Colombia, Venezuela, Ecuador, Peru, and Bolivia, reaching as far sout...
Least Concern
- The Three-striped Warbler is often a 'nuclear species' in mixed-species foraging flocks, meaning other bird species follow its movements for foraging opportunities and increased predator vigilance. - Despite its small size, it can be quite bold, often allowing relatively close approaches by obs...