Grey-and-white Tyrannulet

The grey-and-white tyrannulet (Pseudelaenia leucospodia) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Ecuador and Peru. == Taxonomy and systematics == The grey-and-white tyrannulet was originally described as Elainea leucospodia. Later authors placed it in genera Phaeomyias or Myiopagis, and its original genus was later spelled "Elaenia". A 1986 publication proposed the monotypic genus Pseudelaenia for it. A genetic study published in 2009 confirmed that it belonged there and was not closely related to any of its former genera. The grey-and-white tyrannulet is monotypic. Some authors suggest that the population in southwestern Ecuador should be treated as subspecies P. l. cinereifrons but it probably cannot be distinguished from the Peruvian population. == Description == The grey-and-white tyrannulet is about 12.5 cm (4.9 in) long and weighs 10 to 11 g (0.35 to 0.39 oz). The sexes have the same plumage. Adults have a pale grayish brown crown with a shaggy crest whose white center is exposed when erect. They have a white supercilium and a black line through the eye on an otherwise grayish white face. Their upperparts are pale grayish brown and their tail gray. Their wings are dusky with narrow…