- Empidonax alnorum
5-6" (13-15 cm). Slightly smaller than a House Sparrow. Dull gray-green above, whitish below, with 2 dull white wing bars and narrow white eye ring (often not noticeable).
This is another very difficult Empidonax, and is best identified from similar species by voice, breeding habitat, and nest.
Likely to overlap with Acadian Flycatcher, Black-capped Flycatcher, Buff-breasted Flycatcher, Cordilleran Flycatcher, Dusky Flycatcher, Hammond's Flycatcher, Least Flycatcher, Pacific-slope Flycatcher, Pine Flycatcher, White-throated Flycatcher, Willow Flycatcher, Yellow-bellied Flycatcher, Yellowish Flycatcher.
See also Empidonax.
Willows, alders, brushy swamps.
The diet includes insects, some fruit in winter.
The nest is a coarse, loose cup. The clutch consists of 3-4 creamy white or buff eggs, unmarked or dotted with dark irregular markings around large end.
Song: a harsh rreeBEEA
- Clements, JF. 2009. The Clements Checklist of Birds of the World. 6th ed., with updates to December 2009. Ithaca: Cornell Univ. Press. ISBN 978-0801445019.
- All About Birds
- BirdForum Opus contributors. (2023) Alder Flycatcher. In: BirdForum, the forum for wild birds and birding. Retrieved 30 November 2023 from https://www.birdforum.net/opus/Alder_Flycatcher
GSearch checked for 2020 platform.