A fairly small flycatcher with a large distribution from Costa Rica to Brazil. Like other members of the Myiobius genus, has a relatively long, dark tail and a blazing yellow rump. Extremely similar to Sulphur-rumped Flycatcher, which is usually found in more mature forest and has a darker breast. Black-tailed is more likely to be found around forest edge or second growth, but there is overlap. Singles or pairs forage in the understory, often following mixed-species flocks. Often fans its tail. Listen for dry “whit” call.