Slaty-headed Tody-Flycatcher
Poecilotriccus sylvia
The slaty-headed tody-flycatcher is about 9 to 10 cm (3.5 to 3.9 in) long and weighs 6.7 to 8.5 g (0.24 to 0.30 oz). The sexes have the same plumage. Adults of the nominate subspecies P. s. sylvia have a gray crown and nape. Their lores are gray; they have a white line above the lores and a broken white eye-ring on an otherwise gray face. Their back, rump, and uppertail coverts are olive. Their wings are blackish with narrow yellowish edges on the inner flight feathers and large yellow tips on the coverts; the latter show as two wing bars. Their tail is olive. Voice: According to Hilty, the slaty-headed tody-flycatcher's vocalizations are "insect- or froglike". They include "a soft, gravelly trup or trup grrrr, varying to tik trrrrrrr; nasal froglike grrrrrrr also given singly. When excited tíc-a-turrr". Fagan similarly describes one call as "a 2-part tip!-purrrrrrrr".
ID text from Wikipedia, CC BY-SA 4.0
White-headed Marsh Tyrant
Arundinicola leucocephala
Voice: They are usually quiet, but they do emit a high-pitched call "sedik!". During courtship, they produce a deeper call "dew-de-lewde", which is repeated at short intervals.
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Slaty-headed Tody-Flycatcher and White-headed Marsh Tyrant.