Black-capped Flycatcher
Empidonax atriceps
The black-capped flycatcher is 10 to 12 cm (3.9 to 4.7 in) long and weighs about 9 g (0.32 oz). The sexes are alike. Adults have a black crown with a short crest and a bold white eye-ring that is wider behind the eye on an otherwise brownish olive face. These features by themselves set it apart from all other Empidonax. Their nape and upperparts are also brownish olive. Their tail is dusky with white outer webs on the outer feathers. Their wings are dusky with pale brown edges on the secondaries and tertials. The wing coverts are dusky with pale brown tips that show as two wing bars. Voice: The black-capped flycatcher has a variety of vocalizations. It makes a "loud keep-keer" in the breeding season, a keep-keep-keep-keep during interactions with others of its species, and "simple whistled tsip, chip, or whit" calls.
ID text from Wikipedia, CC BY-SA 4.0
White-throated Flycatcher
Empidonax albigularis
The white-throated flycatcher is 12 to 14 cm (4.7 to 5.5 in) long. Three individuals weighed 10.4 to 11 g (0.37 to 0.39 oz). The sexes are alike. Adults of the nominate subspecies have a brownish olive or olive brown crown and dull buffy-white lores and eye-ring on an otherwise paler brownish olive or olive brown face. Their upperparts are brownish olive or olive brown. Their tail is deep grayish brown with light brownish olive on the feather edges. Voice: The white-throated flycatcher is quite vocal. Its song in northern Central America is "a slightly 2-part rrrreea'ah!" and its call "a harsh, raspy, somewhat nasal rreeaah! or eaaahh!." Both vocalizations are similar elsewhere it the species' range.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Black-capped Flycatcher and White-throated Flycatcher.