Sulphury Flycatcher

The sulphury flycatcher is about 19 to 20 cm (7.5 to 7.9 in) long and weighs 48 to 61 g (1.7 to 2.2 oz). The sexes have the same plumage. Adults have a mostly dusky head with a mostly hidden orange-yellow patch in the center of the crown, an indistinct whitish supercilium, and a blackish band from the lores to the ear coverts. Their upperparts and tail are dull olive brown. Their wings are dark brownish dusky. Their throat is whitish with blurry dark gray streaks on its sides. Their upper breast is white and the rest of their underparts bright yellow. Voice: The sulphury flycatcher is not highly vocal. One description of its song is a "high-pitched, penetrating ser of blurred trills, zhr'dek ... zhr'r're'k ... zhr'dek'dek ..., like pulses of electric energy". Another is "a shrill, buzzy DZEE'E'E djeeh-chew djeeh-chew! often in duet". One call is "abrupt, high-energy outbursts of strident, almost electrified screeches, zhrEEEEEEEE!, zhr-zhrEEEEEEEEE!".