Anguilla, Antigua And Barbuda, Argentina, Barbados, Bolivia, Brazil, Colombia, Dominica, Ecuador, French Guiana, Grenada (E), Guadeloupe, Martinique, Montserrat, Paraguay, Peru, St Kitts And Nevis, St Lucia, St Vincent and The Grenadines, Suriname, Trinidad and Tobago, Uruguay (B), Venezuela.
Population
Estimated population is unknown (2010).
Euler's Flycatcher (Lathrotriccus euleri) [XC390420]
by Nick Komar from Wild Sumaco, Napo, Ecuador (song)
Euler's Flycatcher (Lathrotriccus euleri) [XC337300]
by Tuomas Seimola from Caraca Monastery, Minas Gerais, Brazil (song)
Subspecies
Genus formerly included within Empidonax. If present species is included in Empidonax, name flaviventris becomes preoccupied, and must give way to johnstonei for Grenada birds. Those from Trinidad also, independently, named as flavirostris (by same author, in same year!), but that name, preoccupied in both genera, gives way to lawrencei.
The following 5 subspecies are recognised:
flaviventris! (Lawrence, 1887) - Grenada, in southern Windward Is (probably extinct).
lawrencei (Allen, JA, 1889) - Trinidad, western and northern Venezuela, locally eastern Colombia, also casually Surinam and French Guiana.
bolivianus (Allen, JA, 1889) - Southern and south-eastern Venezuela, eastern Ecuador, eastern Peru, much of Brazil (except northern and south-east) and north-western Bolivia; some possibly migrate to Colombia.
argentinus (Cabanis, 1868) - Eastern Bolivia, northern Argentina and Paraguay; migrates northern into Amazonia of eastern Peru and eastern Brazil.
euleri (Cabanis, 1868) - South-eastern Brazil, north-eastern Argentina and Uruguay; migrates northern into Amazonia of north-eastern Peru, Bolivia and Brazil.
BirdLife International Species Factsheet