About Elaenia sordida J.T.Zimmer, 1941
This species, commonly called the small-headed elaenia, has the scientific name Elaenia sordida J.T.Zimmer, 1941. Adults measure 16 to 20 cm (6.3 to 7.9 in) in length and weigh 24 to 34.5 g (0.85 to 1.2 oz). It is a large elaenia that lacks a crest, and males and females have identical plumage. Adult small-headed elaenias have a dark olive head with lighter-colored cheeks, a dusky loral spot, and a thin whitish eyering. Their upperparts are dark olive. Their wings are mostly dusky, with pale edges along the flight feathers. The tips of their wing coverts range from whitish to yellowish, and form two distinct bars when the wing is closed. Their tail is dusky, and unworn tail feathers have white tips. Their chin and throat are grayish yellow, their breast and flanks are dull gray-olive, and their belly and undertail coverts are grayish yellow. Both sexes have a brown iris, a short stubby bill that is blackish brown to black, with a pinkish base to the lower mandible, and brown to black legs and feet. Juveniles have dark rufescent brown upperparts and dirty grayish white underparts. The small-headed elaenia is distributed across parts of South America: it occurs locally in Bahia, Brazil, and ranges from southern Mato Grosso do Sul and Minas Gerais in Brazil south into extreme northern Uruguay, and west into eastern Paraguay and northeastern Argentina. It lives in the undergrowth and edges of humid subtropical and temperate forest, secondary forest, and coastal restinga, and also occupies forest fragments and patches of young secondary forest. In Brazil, it is found at elevations between 2,150 and 3,000 m (7,100 and 9,800 ft).
