Golden-faced Tyrannulet
Zimmerius chrysops
The golden-faced tyrannulet is 10.5 to 11.5 cm (4.1 to 4.5 in) long and weighs 7.7 to 10.6 g (0.27 to 0.37 oz). The sexes have the same plumage. Adults have a bright yellow forehead, supercilium and area around the eye and a dark stripe through the eye on an otherwise yellowish white face. Their crown, back, and rump are bright olive. Their wings are dusky with bright yellow edges on the coverts and flight feathers. Their tail is dusky. Their throat is yellowish white and their breast, flanks, and belly dull whitish. Voice: The golden-faced tyrannulet is highly vocal. Its dawn song is a "plaintive chu-de-de'e'e". Another author describes it as "a slightly rising, accelerating, laughing series of notes: tee-heeheeheehee". Its daytime calls include "a simple clear 'cleeuw' or 'peeur' " and a "ringing 'teer-tif' ".
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
Learn this pair in the BeakBrain App
Photo and call practice. Coming soon to iPhone and Android.
Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Golden-faced Tyrannulet and Slender-footed Tyrannulet.