The Amazonian Black-Tyrant is a striking flycatcher of Amazonian wetlands. Males are shiny black throughout the plumage with blue bills, while females are olive brown above and streaked and paler below with rufous edging to the tail feathers. Amazonian Black-Tyrants are typically found low in flooded woodland within their range, sallying abruptly for insects near the ground or water. The species is distributed locally along the Amazon and Orinoco River corridors. Amazonian Black-Tyrant is confusable with the similar Riverside Tyrant, though that species is larger and typically more conspicuous in open riverine habitats.