Yellow-rumped Siskin

The yellow-rumped siskin is 12 to 14 cm (4.7 to 5.5 in) long; one individual weighed 14 g (0.49 oz). The species is sexually dimorphic but not dramatically so. Adult males have a sooty black head, neck, throat, and upper breast. Their back is sooty black, their rump bright yellow, and their uppertail coverts blackish with wide yellowish edges. Their tail is mostly black with wide yellow edges at the bases of the outer feathers. Their wings' greater coverts have wide yellow tips and the median coverts have small yellow tips. Voice: The yellow-rumped siskin's song is not well known, but is described as "a rich and melodious series of warbling phrases interspersed with twitters and trills" that is delivered more slowly than the songs of other siskins. Its call is "a nasal pheew".