Description wikipedia

The bay-ringed tyrannulet (Phylloscartes sylviolus) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Brazil, and Paraguay. == Taxonomy and systematics == The bay-ringed tyrannulet was originally described as Leptotriccus sylviolus. Genus Leptotriccus was merged into Phylloscartes in the 1970s. Though relationships among members of Phylloscartes have not been fully resolved, it appears that the bay-ringed tyrannulet's closest relatives are the rufous-lored tyrannulet (P. flaviventris) and the cinnamon-faced tyrannulet (P. parkeri). The bay-ringed tyrannulet is monotypic. == Description == The bay-ringed tyrannulet is about 12 cm (4.7 in) long and weighs about 8 g (0.28 oz). The sexes have the same plumage. Adults are rufous-chestnut at the lores whose color extends to a wide eye-ring. The upper part of their face is olive and the lower part pale yellow. Their crown and upperparts are bright olive. Their wings are dusky with olive edges on the flight feathers. Their wing coverts are dusky with pale yellow tips that form a wing bar. Their tail is dusky with olive edges to the feathers. Their chin is yellow, their throat a paler yellow, and the rest of their underparts are mostly whitish with a greenish dusky tinge on the sides of the breast and flanks and yellow undertail coverts. Both sexes have a bright white iris, a pointed black bill, and bluish gray to slate legs and feet.