Slender-footed Tyrannulet

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.