Moustached Brushfinch

Overview

The moustached brushfinch (Atlapetes albofrenatus) is a species of New World sparrow found exclusively in the eastern Andes of Colombia. Classified as Least Concern on the IUCN Red List, it is a resident, non-migratory bird that inhabits upper tropical and subtropical zones between 1,400 and 2,500 m in altitude.

Identification

• Adults measure 17.5 to 18 cm in length and weigh approximately 30 g, exhibiting a large head and long tail characteristic of its genus.
• Plumage features olive-green upper parts with black primaries and tail, contrasting with a deep yellow breast, belly, and vent.
• The head displays a striking pattern with a bright chestnut-rufous cap, a black forehead, and an all-black mask, framed by white throat and malar stripes.
• Juveniles are duller, with an olive-brown crown and faint streaking on the underparts, lacking the vibrant chestnut of adults.

Habitat

Endemic to the Eastern Andes of Colombia, the species ranges from just south of Bogotá to Santander in a localized, disjunct pattern. It inhabits the borders, undergrowth, and midstory of thick subtropical cloud, elfin, and oak-dominated forests, as well as tangles of dry, thorny, scrubby brush. The bird is tolerant of disturbed habitats and is often found in the dense foliage of regenerating secondary forest.

Diet

The moustached brushfinch feeds on a diet of insects, seeds, and fruit. Foraging activity occurs mainly close to the ground, at heights under 10 m, and involves quick movement through dense tangles of brush with occasional visits to more exposed positions.

Did you know?

This species was first described in 1940 by French ornithologist Auguste Boissonneau, who originally classified it within the tanager family, naming it Tanagra (arremon) albo-frenatus before its reclassification into the family Passerellidae.