Slaty Elaenia

The slaty elaenia (Elaenia strepera) is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Colombia, Peru, and Venezuela, and as a vagrant in Ecuador and on Trinidad. == Taxonomy and systematics == The slaty elaenia is monotypic. == Description == The slaty elaenia is 15 to 16 cm (5.9 to 6.3 in) long and weighs 18 to 20 g (0.63 to 0.71 oz). It is a small elaenia with a slight crest. Adult males have a slate-gray head with slightly paler cheeks, a thin white eyering, and a partially concealed white patch in the middle of the crown. Their upperparts are slate-gray. Their wings are mostly dusky gray; they are slightly paler on the edges of the flight feathers and the tips of the coverts. The latter show as two very faint bars on the closed wing. Their tail is dusky. Their throat is whitish to pale gray, their breast and flanks gray, and their belly and undertail coverts whitish. Adult females have an olive wash on their upperparts, more prominent and ochraceous-tinged wing bars than the male, an olive-gray throat and breast, and a yellowish white belly. Both…