Jelski's Black Tyrant

Jelski's black tyrant is 14.5 to 16.5 cm (5.7 to 6.5 in) long. Adult males are entirely sooty black. Adult females have mostly dark olive-brown upperparts with more rufous uppertail coverts. Their wings are dark olive-brown with whitish to buff edges on the coverts that show as two wing bars. Their tail is dusky with thin cinnamon-rufous edges to the feathers. Their underparts are mostly heavily streaked with dark grayish olive and their undertail coverts are dark buffy. Both sexes have a dark red or chestnut iris, a blackish bill, and black legs and feet. Voice: As of May 2025 neither xeno-canto nor the Cornell Lab of Ornithology's Macaulay Library had any recordings of Jelski's black tyrant vocalizations.