Chapman's bristle tyrant
Chapman's bristle tyrant, also known as Chapman's tyrannulet, is a species of passerine bird in the family Tyrannidae, the tyrant flycatchers. It is found in Brazil, Guyana, and Venezuela.
Taxonomy and systematics
Chapman's bristle tyrant was originally described as Phylloscartes chapmani. Its specific epithet honors Dr. Frank M. Chapman. Beginning in 2016 taxonomic systems resurrected genus Pogonotriccus for this species and a few others.Chapman's bristle tyrant has two subspecies, the nominate P. c. chapmani and P. c. duidae.
Description
Chapman's bristle tyrant is about long and weighs. The sexes have the same plumage. Adults of the nominate subspecies have a whitish supercilium and a white eye-ring on an otherwise gray and white grizzled face. A black line through the eye continues as a crescent behind the ear coverts. Their crown, back, and rump are dull olive; the crown is slightly darker. Their wings are dusky with pale buffy yellow to buffy white edges on the flight feathers. Their wing coverts are dusky with wide buff tips that show as two conspicuous wing bars. Their tail is dusky olive. Their throat and breast are olive-yellow and their flanks and belly pale yellow. Subspecies P. c. duidae has paler and more yellow-green upperparts than the nominate, and the edges of the flight feathers are more yellowish. Both subspecies have a brown iris, a short pointed black bill with a pale yellow base to the mandible, and gray legs and feet.Distribution and habitat
Sources differ in their range statements for Chapman's bristle tyrant, though all agree that it is found on tepuis in some part of the area where Venezuela, Guyana, and Brazil meet. The International Ornithological Committee places both subspecies only in Venezuela. Hilty's Birds of Venezuela treats the species as a Venezuelan endemic but states it is "Doubtless in adj. Brazil and Guyana". The Clements taxonomy places the nominate subspecies in Venezuela's Bolívar and Amazonas states and subspecies P. c. duidae on Cerro de la Neblina in far southern Amazonas and perhaps on the Brazilian side of that tepui as well. The South American Classification Committee of the American Ornithological Society places the species in all three countries without noting which subspecies is where. The Cornell Lab of Ornithology's Birds of the World places the nominate subspecies in all three countries. It places P. c. duidae on Cerro Duida in Amazonas and Cerro de la Neblina in Amazonas and Brazil.Chapman's bristle tyrant inhabits humid montane evergreen forest on the slopes of tepuis, where it especially favors areas heavy with mosses. In elevation it ranges between.