Black-capped Pygmy Tyrant
Myiornis atricapillus
The black-capped pygmy tyrant is 6 to 8 cm (2.4 to 3.1 in) long; three individuals weighed 5.5 to 6 g (0.19 to 0.21 oz). It is the smallest passerine in Central America and among the smallest on Earth. Adult males have a black crown that fades to slate gray at its rear and on the nape. They have white lores that continue to a white eye-ring and a black spot by the eye on an otherwise slate gray face. Their back, rump, and uppertail coverts are bright olive green. Their greater and median wing coverts are slate black with olive green tips and their lesser wing coverts are bright olive green. Voice: The black-capped pygmy tyrant's vocalizations are high pitched and similar to calls made by insects and frogs. What is thought to be its song is a "'crreek' or 'tstrreep' " that is often given singly but also in a series. Other vocalizations include "a sharp, reedy tseep or keep which rises in inflection" and a "tsrit" that sounds like a warbler or cricket.
ID text from Wikipedia, CC BY-SA 4.0

Eared Pygmy Tyrant
Myiornis auricularis
The eared pygmy tyrant is about 7 to 9 cm (2.8 to 3.5 in) long and weighs about 5 g (0.18 oz). It is a very small, large-headed bird with a dramatic facial pattern. The sexes have the same plumage. Adults of the nominate subspecies have a buffish cinnamon area surrounding the eye, whitish ear coverts with a black crescent behind them, and a black patch below the eye. Their crown is bright olive with a brown tinge, their nape and neck gray, and their back and rump bright olive. Voice: The eared pygmy tyrant's song is a "very high, short, clear trill, often preceded by lower, short 'wit', together as 'wit-trruh' ". Its call is "high, stressed 'pic' notes".
ID text from Wikipedia, CC BY-SA 4.0
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: Black-capped Pygmy Tyrant and Eared Pygmy Tyrant.