has not been recorded since the early 1950s, and is likely extinct. The reasons for this are insufficiently known, but probably related to habitat destruction and possibly introduced predators. A junior synonym of flaviventris is johnstoni, but the latter was used when Euler's flycatcher was placed in the genus Empidonax, as flaviventris is preoccupied in that genus by the yellow-bellied flycatcher (E. flaviventris). References Further reading ffrench, Richard; O'Neill, John Patton & Eckelberry, Don R. (1991): A guide to the birds of Trinidad and Tobago (2nd edition). Comstock Publishing, Ithaca, N.Y. Hilty, Steven L. (2003): Birds of Venezuela. Christopher Helm, London. Euler's flycatcher Birds of the Amazon Basin Birds of Brazil Birds of Colombia Birds of Venezuela Birds of Trinidad and Tobago Birds of Bolivia Birds of Paraguay Birds of Uruguay Euler's flycatcher