The piratic flycatcher (Legatus leucophaius) is a passerine bird, the only member of the genus Legatus. It is a resident breeder from southern Mexico and Trinidad south to Bolivia and Argentina. At least some birds from Central America and Trinidad are migratory, and this species also visits Tobago.
This tyrant flycatcher is found in savannah and other semi-open habitat with large trees. It gets its name because it does not build its own nest, but appropriates the domed or enclosed nests of other, often far larger, bird species, such as yellow-rumped cacique or crested oropendola. Once the persistence of the flycatchers has driven the rightful owners away, their eggs are removed, and the female flycatcher lays up to four, but usually two, black-streaked brown eggs. She incubates these on her own for 16 days to hatching, with a further 18–20 days to fledging.