D'Orbigny's Chat-Tyrant
Ochthoeca oenanthoides
D'Orbigny's chat-tyrant is 15 to 15.5 cm (5.9 to 6.1 in) long. The sexes have the same plumage. Adults of the nominate subspecies have a grayish or grayish brown crown, a wide whitish supercilium that begins at the lores and extends well past the eye, and a blackish "mask". Their upperparts are grayish brown or grayish. Their wings are a duskier grayish brown with a weak grayish cinnamon wing bar. The wing's secondaries have thin white edges and their tertials grayish cinnamon edges. Their tail is dusky grayish brown with white outer webs of the outermost feathers. Voice: One vocalization of D'Orbigny's chat-tyrant is described as "a weak, squeaky chatter, often in duet of tee'per phrases". Another description is a "fairly musical reeka-teekera...reeka-teekera...".
ID text from Wikipedia, CC BY-SA 4.0
White-browed Chat-Tyrant
Ochthoeca leucophrys
The white-browed chat-tyrant is 14.5 to 15.5 cm (5.7 to 6.1 in) long. The sexes have the same plumage. Adults of the nominate subspecies O. l. leucophrys have a dark gray to grayish brown crown, a wide white supercilium that begins at the lores and extends well past the eye, and a blackish "mask". Their upperparts are a slightly lighter gray to grayish brown than the crown with a slight cinnamon tinge on the lower back and rump. Their wings are a duskier gray with two faint cinnamon wing bars. Their tail is dusky with white outer webs on the outermost feathers. Voice: What is thought to be the white-browed chat-tyrant's song is "a squeaky chatter, usually in duet: wu-chew'widdu". Its calls are "a squeaky, rising-falling weeo and a higher weedee?". In Argentina it makes "a sharp keeew".
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: D'Orbigny's Chat-Tyrant and White-browed Chat-Tyrant.