Tawny-breasted Myiobius
Myiobius villosus
The tawny-breasted myiobius grows to a length of about 14 cm (5.5 in). The upper parts are mainly dark olive, and the rump is yellow. There is usually a yellow patch on the crown in males that is normally kept hidden; this patch is cinnamon-brown in females. The underparts are mainly reddish-brown, the throat is dull white and the centre of the belly has a pale yellow patch. The otherwise similar sulphur-rumped myiobius (Myiobius sulphureipygius) has paler upper parts and much yellower underparts, with tawniness only present at the sides.
ID text from Wikipedia, CC BY-SA 4.0
Whiskered Myiobius
Myiobius barbatus
The whiskered myiobius is very similar in appearance to several closely related species. It has olive upper parts, an obvious yellow rump and a usually well-concealed yellow patch on the crown. The rictal bristles round the beak are long and form a basket-like structure. The underparts are greyish-olive and the belly pale yellow. The tail is black and somewhat rounded. It is usually a silent bird, but sometimes utters a staccato "psik".
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: Tawny-breasted Myiobius and Whiskered Myiobius.