The black-tailed myiobius or black-tailed flycatcher (Myiobius atricaudus) is a species of bird in the family Tityridae., however a number of other taxonomic authorities place it in the Tyrannidae.Black-tailed flycatchers are found in Brazil, Colombia, Costa Rica, Ecuador, Panama, Peru, and Venezuela. Their natural habitats are subtropical or tropical moist lowland forests and heavily degraded former forest. They are usually found alone or in pairs, but may join flocks of several species.