Antioquia Bristle Tyrant

The Antioquia bristle tyrant is about 11 to 11.5 cm (4.3 to 4.5 in) long. The sexes have the same plumage. Adults have a gray crown with a greenish cast, grizzled gray and white lores, and an indistinct grayish eye-ring. Their ear coverts are yellow with pale gray tips. Their back and rump are bright olive green and their uppertail coverts bright olive yellow. Their tail is dark brownish gray. Their wings are dark brownish gray with bright olive green edges on the flight feathers. Their wing coverts are dark brownish gray with bright yellow tips that show as two wing bars. Voice: The Antioquia bristle tyrant's song is "a short stutter, introduced with a chip and ending with several wheezy notes".