Description wikipedia

The lemon-chested greenlet (Hylophilus thoracicus) is a species of bird in the family Vireonidae, the vireos, greenlets, and shrike-babblers. It is found in Bolivia, Brazil, Colombia, Ecuador, French Guiana, Guyana, Peru, Suriname, and Venezuela. The lemon-chested greenlet is 10 to 13 cm (3.9 to 5.1 in) long and weighs 11 to 14 g (0.39 to 0.49 oz). The sexes have the same plumage. Adults of the nominate subspecies H. t. thoracicus have an ochraceous olive forehead, a dull grayish olive crown, and a wide grayish nape collar. They have grayish lores and sides of the head with a greenish tinge on the ear coverts. Their upperparts are bright olive that often has a yellowish tinge. Their wings' coverts and flight feathers are dull blackish gray with wide bright olive to yellowish green edges on the latter. Their tail is also dull blackish with wide bright olive to yellowish green feather edges. Their chin and throat are grayish to grayish white and their breast bright yellow. The rest of their underparts are pale creamy buff to whitish with a variable yellow tinge on the flanks, vent, and undertail coverts. Subspecies H. t. aemulus has less gray on the crown and more buffy throat and underparts than the nominate. H. t. griseiventris has a gray hindcrown, a gray throat, a greenish yellow breast, and gray lower underparts. Juveniles of all subspecies are essentially duller versions of the adults. Adults of all subspecies have a whitish to bright white iris with sometimes a yellow to pinkish tinge. They have a gray to dark maxilla, a white to pinkish mandible, and gray to pinkish legs and feet. Juveniles have a brown to dark gray-brown iris.