Sclater's Tyrannulet
Phyllomyias sclateri
Sclater's tyrannulet is 11.5 to 12.5 cm (4.5 to 4.9 in) long. The sexes have the same plumage. Adults of the nominate subspecies have a dull olive-green crown, nape, back, and rump with a grayish tinge on the crown. They have whitish lores and narrow supercilium. Their wings are dusky with pale yellow to whitish edges on the flight feathers and the ends of the coverts; the last show as two bars on the closed wing. Their tail is dusky olive. Their throat is grayish white and their lower face grizzled whitish. Their breast is pale gray that becomes pale yellowish on their flanks and belly. Voice: What is thought to be the song of Sclater's tyrannulet is "a deep, gruff chanting: djeer djeer djeer djeer interspersed with sharper tchik tchik thcik notes".
ID text from Wikipedia, CC BY-SA 4.0
Sooty-headed Tyrannulet
Phyllomyias griseiceps
The sooty-headed tyrannulet is about 10 cm (3.9 in) long and weighs about 8 g (0.28 oz). The sexes have the same plumage. Adults have a grayish to blackish crown and dull grayish olive nape, back, and rump. Their lores and supercilium are white with a dark stripe through their eye. Their lower face is grizzled. Their wings are dusky with narrow whitish edges to the inner flight feathers and the ends of the coverts. Their tail is dusky. Their throat is grayish white, their breast and flanks pale olive, and their belly bright yellow. Voice: The sooty-headed tyrannulet often sings from an open perch. Its song varies geographically, but in general is "an emphatic phrase of clear, short whistled notes, first one stressed, 'whip, whip-di-irip' or 'whit, whit-wheeu' ".
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: Sclater's Tyrannulet and Sooty-headed Tyrannulet.