Euler's flycatcher
| Euler's flycatcher | |
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| Euler's flycatcher at Bertioga, São Paulo State, Brazil | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Aves |
| Order: | Passeriformes |
| Family: | Tyrannidae |
| Genus: | Lathrotriccus |
| Species: | L. euleri |
| Binomial name | |
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Lathrotriccus euleri (Cabanis, 1868) |
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| Synonyms | |
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Empidonax euleri |
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Empidonax euleri
Euler's flycatcher (Lathrotriccus euleri) is a small passerine bird in the tyrant flycatcher family. It breeds in South America east of the Andes from Colombia and Venezuela south to Bolivia and Argentina, and on the islands of Trinidad and formerly also Grenada (see below). This species is named for the Swiss ornithologist Carl Euler.
In appearance, it closely resembles the Empidonax flycatchers, and was formerly placed in that genus, but differs in anatomical and molecular characters. Euler's flycatcher is on average 12.7 centimetres (5.0 in) long and weighs 10–11 grams (0.35–0.39 oz). The upperparts are olive-brown with darker brown wings and two dull buff wing bars. The throat breast is grey, the breast is brown, and the abdomen is pale yellow. There is a white eyering, but no supercilium. Sexes are similar. There are other races, differing in the tone of the upperpart or underpart colour. The call is a loud hoarse chee-chi-wi-wi-wi.
This species is found in the lower and middle levels of forests. Euler's flycatchers are inconspicuous birds, tending to keep to undergrowth perches from which they sally forth to catch insects; they are also capable of hovering flight to pick off prey from plants, but use it far less often.
In subtropical montane forest in the south of its range, it breeds in the rainy summer months, with peak nesting activity in late October to November and extending to January–February. The open cup nest is made of grass, leaves and plant fibre and placed in a tree fork. It is usually located a few meters above ground, but may be right up in the tree's crown.
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