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The alder flycatcher (Empidonax alnorum) is a small insect-eating bird of the tyrant flycatcher family. The genus name Empidonax is from Ancient Greek empis, "gnat", and anax, "master". The specific alnorum is Latin and means "of the alders".
Adults have olive-brown upperparts, browner on the wings and tail, with whitish underparts; they have a white eye ring, white wing bars, a small bill and a short tail. The breast is washed with olive-grey. The upper part of the bill is grey; the lower part is orangish. At one time, this bird was included with the very similar willow flycatcher in a single species, "Traill's flycatcher".
They wait on a perch near the top of a shrub and fly out to catch insects in flight, also sometimes picking insects from foliage while hovering. They may eat some berries and seeds.
This bird's song is a wheezed ree-BEE-a. The call is a quick preet.
- BirdLife International (2012). "Empidonax alnorum". IUCN Red List of Threatened Species. Version 2013.2. International Union for Conservation of Nature. Retrieved 26 November 2013.
- Jobling, James A (2010). The Helm Dictionary of Scientific Bird Names. London: Christopher Helm. pp. 42, 146. ISBN 978-1-4081-2501-4.
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