Large-headed Flatbill

The large-headed flatbill (Ramphotrigon megacephalum), also known as the bamboo flatbill, is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Brazil, Colombia, Ecuador, Guyana, Paraguay, Peru, Suriname, and Venezuela. == Taxonomy and systematics == The large-headed flatbill was formally first described as an illustration, though not in text, as the "great-headed flycatcher", Tyrannula megacephala. Later it was placed in genus Tolmomyias. It has also had the binomial Ramphotrigon megacephala and some authors have called it the "bamboo Flatbill". The large-headed flatbill has these four subspecies: R. m. pectorale Zimmer, JT & Phelps, WH, 1947 R. m. venezuelense Phelps, WH & Gilliard, 1941 R. m. bolivianum Zimmer, JT, 1939 R. m. megacephalum (Swainson, 1835) == Description == The large-headed flatbill is 12.5 to 13.2 cm (4.9 to 5.2 in) long and weighs 13 to 15 g (0.46 to 0.53 oz). The sexes have the same plumage. Adults of the nominate subspecies R. m. megacephalum have a dark olive crown, dusky lores, a whitish to yellowish streak behind the lores, and a whitish to yellowish eye-ring on an otherwise dark olive face. Their upperparts are dark olive. Their wings are mostly dusky with…