Choco Manakin

The Choco manakin is 11 to 13 cm (4.3 to 5.1 in) long and weighs 15 to 21 g (0.53 to 0.74 oz). The sexes are alike. Adults of the nominate subspecies have a pale olivaceous green head, upperparts, and central tail feathers. Their wings and outer tail feathers are dusky or brownish with moss green outer edges. Their throat, breast, flanks and undertail coverts are olive and their chin and central belly are pale yellowish. Voice: What is thought to be the Choco manakin's song is "a high-pitched, thin whistle that starts with an initial short upward component...before descending more slowly". It also gives "a high-pitched, fast, sputtering rattle".