Acanthidops bairdi
The Peg-billed Finch (Acanthidops bairdi), despite its common name, is now firmly classified within the tanager family (Thraupidae), not the true finches (Fringillidae), representing a fascinating case of convergent evolution. This small, inconspicuous bird measures about 12.5-14 cm (4.9-5.5 inches) in length and weighs approximately 12-16 grams. Its most striking feature, and the origin of its name, is its distinctive, slender, and slightly decurved black bill, which is uniquely peg-like and...
Found exclusively in high-elevation montane cloud forests and paramo edges, typically between 1,800 to 3,300 meters (5,900-10,800 feet) above sea level, preferring areas with dense undergrowth and moss-laden trees.
Feeds predominantly on small insects, insect larvae, and pupae, expertly extracted from plant stems, mosses, and epiphytes using its specialized bill; occasionally consumes small fruits.
The Peg-billed Finch is primarily diurnal, typically observed foraging alone or in pairs, though it frequently joins mixed-species flocks with other small tanagers, warblers, and foliage gleaners. Its remarkable peg-like bill is expertly employed in a unique foraging strategy: it probes deeply in...
The Peg-billed Finch is a resident species, highly restricted in its geographic distribution, being endemic to the high-elevation montane cloud forests of Costa Rica and western Panama. In Costa Rica, its range extends across the major mountain ranges, including the Cordillera de Tilarán, Cordill...
Least Concern
- Despite its common name, the Peg-billed Finch is not a true finch but belongs to the diverse tanager family (Thraupidae), a revelation that underscores convergent evolution. - Its unique, slender, slightly decurved bill, from which it gets its name, is perfectly adapted for a highly specialized...