Euler's Flycatcher Lathrotriccus euleri Scientific name definitions

Euler’s Flycatcher is fairly uncommon throughout its large range. In the northern portions of its range, it is a resident of humid lowland forest. Birds from further south are migrants, breeding in the southern extent of their range, then migrating further north for the austral winter. These different patterns are reflected in this species’ several subspecies: two subspecies are migratory, and three additional subspecies are residents. All subspecies share a fairly dark brownish or olive-brown coloration above, a pale belly, and olive or brown on the chest. Additionally, all have buffy wingbars and a vague eyebrow stripe. They occupy dense understory of woodlands and forest edges, where they feed by sallying for insects. They are generally solitary and do not join mixed flocks. Their voice varies by subspecies, but all share a short buzzy quality.

12·7–13·5 cm; 9–13·8 g (1 Junge, G. C. A., and G. F. Mees (1958). The avifauna of Trinidad and Tobago. Zoologische Verhandelingen 37(1):1–172. Close , 2 Fry, C. H. (1970). Ecological distribution of birds in north-eastern Mato Grosso state, Brazil. Anais da Academia Brasileira de Ciências 42:275–318. Close , 3 Contreras, J. R. (1979). Bird weights from northeastern Argentina. Bulletin of the British Ornithologists' Club 99(1):21–24. Close , 4 Alderete, C., and P. Capllonch (2010). El peso de aves en familias pertenecientes al orden Suboscines en la Argentina. Nótulas Faunísticas (Segunda Serie) 58:1–5. Close ). Generally drab, similar to some Empidonax species, but browner above and buffier wingbars. Nominate race has warm olive-brown crown, whitish eyering and indistinct supraloral stripe; cheek, nape and back olive-brown, rump brown; wings dusky, two pale buff wingbars, pale buffy-brown margins of secondaries and tertials; tail dusky; throat greyish white, breast washed brownish-olive, belly pale yellow to white; iris dark; maxilla black, mandible dull pinkish or dull orangish pink; legs blackish brown. Sexes similar. Races vary in size and colour: argentinus is similar to nominate but with whitish throat, drabber grey breast, white belly; lawrencei is more olive above, breast olive-grey, yellower on belly; bolivianus is slightly less olive above than previous, pale olive-grey breast, perhaps less yellow belly, juvenile browner than adult and with slightly buffier wingbars; johnstonei is little known, generally similar to nominate except that wingbars vary to more reddish brown than buff, breastband greyer.

Editor's Note: This article requires further editing work to merge existing content into the appropriate Subspecies sections. Please bear with us while this update takes place.

Editor's Note: Additional distribution information for this taxon can be found in the 'Subspecies' article above. In the future we will develop a range-wide distribution article.