Yellow-winged Flatbill

The yellow-winged flatbill (Tolmomyias flavotectus), also known as yellow-winged flycatcher and yellow-margined flatbill, is a species of bird in the tyrant flycatcher family Tyrannidae. It is found in Colombia, Costa Rica, Ecuador, and Panama. == Taxonomy and systematics == The yellow-winged flatbill was originally described by the German ornithologist Ernst Hartert in 1902. He coined the trinomial name Rhynchocyclus megacephala flavotectus and specified the type location as Hacienda Paramba, Imbabura, Ecuador. It was long treated as a subspecies of what is now the yellow-margined flatbill (Tolmomyias assimilis) which is found to the east of the Andes and has very different vocalization. Taxonomic systems began separating them in 2016 and the process continued until 2024. Confusingly, for a time T. flavotectus was called the yellow-margined flatbill. The yellow-winged flatbill is monotypic. == Description == The yellow-winged flatbill is 13 to 13.5 cm (5.1 to 5.3 in) long and weighs about 15 g (0.53 oz). The sexes have the same plumage. Adults have a mostly dark gray head with a white eye-ring. Their back, rump, uppertail coverts, and tail are olive-green. Their wings are dusky with wide yellow feather edges that give the species its English name. Their throat and breast are…