Panama Tyrannulet

The Panama tyrannulet or yellow-green tyrannulet (Phylloscartes flavovirens) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is endemic to Panama. == Taxonomy and systematics == The Panama tyrannulet was originally described as Leptopogon flavovirens in 1862 and by the mid twentieth century had been transferred to genus Phylloscartes. Some early twentieth century authors considered the Panama tyrannulet and what are now the olive-green tyrannulet (P. virescens) and mottle-cheeked tyrannulet (P. ventralis) as conspecific. The three are now treated by many authors as a superspecies. The Panama tyrannulet is monotypic. == Description == The Panama tyrannulet is 10 to 11 cm (3.9 to 4.3 in) long; one female weighed 8.8 g (0.31 oz). The sexes have the same plumage. Adults have grayish white lores and a white eye-ring. A dusky band through the eye continues around the yellowish ear coverts. Their upperparts are olive green with a slighter grayer crown. Their wings are dusky with yellowish olive green to yellower edges on the flight feathers. Their wing coverts are dusky with large pale yellow tips that form two wing bars. Their tail is grayish brown with pale olive green edges to the feathers. Their underparts are…