|Alder flycatchers, Empidonax alnorum|
The genus Empidonax is a group of small insect-eating passerine birds in the tyrant flycatcher family, the Tyrannidae. The genus name Empidonax is from Ancient Greek empis, "gnat", and anax, "master".
Most of these birds are very similar in plumage: olive on the upper parts with light underparts, eye rings and wing bars. In the nesting season they may be distinguished by range, habitat and call; in other situations, particularly on migration and in winter, it may not be possible to be sure of specific identification.
Empidonax flycatchers often flick their wings and tails rapidly.
Euler's flycatcher, Lathrotriccus euleri and gray-breasted flycatcher, Lathrotriccus griseipectus were formerly placed in Empidonax, but differ anatomically and biochemically and are now placed in the genus Lathrotriccus.
|Image||Scientific name||Common Name||Distribution|
|Empidonax flaviventris||Yellow-bellied flycatcher||North american, Mexico and Central America|
|Empidonax virescens||Acadian flycatcher||eastern United States and southwestern Ontario, eastern Mexico and the Caribbean to southern Central America and the very northwest of South America in Colombia, western Venezuela, and Ecuador|
|Empidonax alnorum||Alder flycatcher||Canada and Alaska, descending to a southernmost point in the northeastern United States|
|Empidonax traillii||Willow flycatcher||United States and southern Canada|
|Empidonax albigularis||White-throated flycatcher||Belize, Costa Rica, El Salvador, Guatemala, Honduras, Mexico, Nicaragua, and Panama.|
|Empidonax minimus||Least flycatcher||eastern North America|
|Empidonax hammondii||Hammond's flycatcher||western United States, Alaska and Canada|
|Empidonax wrightii||American grey flycatcher||western North America, especially the Great Basin.|
|Empidonax oberholseri||American dusky flycatcher||southern Arizona and Mexico|
|Empidonax affinis||Pine flycatcher||Mexico and southwestern Guatemala.|
|Empidonax difficilis||Pacific-slope flycatcher||western North America, including the Pacific Ocean and the southern Gulf of California|
|Empidonax occidentalis||Cordilleran flycatcher||California to Alaska|
|Empidonax flavescens||Yellowish flycatcher||southeastern Mexico south to western Panama.|
|Empidonax fulvifrons||Buff-breasted flycatcher||United States through Mexico to southern Honduras.|
|Empidonax atriceps||Black-capped flycatcher||Costa Rica and western Panama.|
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