Guatemalan Tyrannulet
Zimmerius vilissimus
The Guatemalan tyrannulet is 10 to 12 cm (3.9 to 4.7 in) long. The sexes have the same plumage. Adults have a grayish crown and a short whitish supercilium. Their upperparts are olive green. Their wings and tail are mostly olive green with yellow edges on the wing coverts, flight feathers, and tail feathers. Their underparts are mostly off-white with faint darker streaks on the breast and sometimes a pale yellow wash on the belly and undertail coverts. Both sexes have a light brown or brownish black iris, a short brownish black bill, and long brownish black legs and feet. Voice: The Guatemalan tyrannulet's call is "a clear, slightly ringing to plaintive peeu or pyeu". It is assumed to have a dawn song like that of the mistletoe tyrannulet's, which is "a series of notes, the first a slow, dropping syllable and the rest short and rising...yer-de-dee, often followed by a trill".
ID text from Wikipedia, CC BY-SA 4.0
Slender-footed Tyrannulet
Zimmerius gracilipes
The slender-footed tyrannulet is 9 to 12 cm (3.5 to 4.7 in) long and weighs 6.6 to 9.5 g (0.23 to 0.34 oz). The sexes have the same plumage. Adults of the nominate subspecies have a gray forehead and crown. They have a thin whitish supercilium that starts at their lores and a dark stripe through the eye on an otherwise yellowish white face. Their back and rump are dull olive. Their wings are dusky with thin yellow edges on the coverts and inner parts of the flight feathers. Their tail is dusky olive. Voice: The dawn song of the slender-footed tyrannulet's nominate subspecies has been described as "a soft, querulous, semimusical 'peeu, tri-ri-ri' " and its call as "an inflected 'tuwee?' ". Another author described them similarly as "a rising musical chatter" tew-tui'i'i tew-tui'i'i" and "a mewing, rising huee". The dawn song of subspecies Z. g.
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: Guatemalan Tyrannulet and Slender-footed Tyrannulet.