Black-capped Pygmy Tyrant

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.