Black-billed Thrush

The black-billed thrush is 18.5 to 24 cm (7.3 to 9.4 in) long and weighs 48 to 81 g (1.7 to 2.9 oz). The sexes have the same plumage. Adults of the nominate subspecies T. i. ignobilis have an olive-brown head and upperparts with a slightly darker face and an off-white throat with dark streaks. Their breast and flanks are a paler olive-brown and their belly and undertail coverts are whitish. They have a black iris, a black bill, and dark gray-brown to black legs and feet. Subspecies T. i. goodfellowi has warmer and darker olive-brown upperparts than the nominate. T. i. Voice: The black-billed thrush's song in Venezuela is "a rather slow caroling churre, churre, ee, TE-O-we, churre... and so on with pleasing, relaxed phrases; some individuals sing very repetitive phrases". It calls there are "a loud pfeea! or wEEa!". Similarly, in Peru it is described as "a pleasant and musical caroling, often with a particular phrase given twice".