Sierran Elaenia

The sierran elaenia is 14 to 15 cm (5.5 to 5.9 in) long and weighs about 12 to 18 g (0.42 to 0.63 oz). It is a small elaenia without a crest. The sexes have the same plumage. Adults of the nominate subspecies have an olive head with lighter and yellower cheeks, yellowish lores, a yellowish eyering, and a thin white strip in the center of the crown. Their upperparts are olive. Their wings are dusky olive with paler edges on the flight feathers. The tips of their wing coverts are yellowish white and show as two bars on the closed wing. Their tail is dusky olive. Voice: The sierran elaenia's dawn song is "a burry djee'wee interspersed with an occasional sneezy tjrr". Its day song is "a pure rising-falling peew or rising whee?" and its call is "a low djr-djr-djr".