Grey Monjita
Nengetus cinereus
The grey monjita is 21 to 25 cm (8.3 to 9.8 in) long and weighs 50 to 62 g (1.8 to 2.2 oz). The sexes have the same plumage and the two subspecies are essentially alike. Adults have a mouse-gray or dusky grayish crown, a wide white stripe from the lores to above the eye, and a thin white "moustache" with a wider black stripe below it. Their upperparts are mouse-gray or dusky grayish. Their wings are black with wide white bases to the primaries that show in flight. Their wing coverts have white tips and the tertials have white edges. Their tail is black with wide white tips on the feathers. Voice: The grey monjita's song has been described as a "very high, soft weeh-tjuh-teeh" and its call as a "very high, thin weéh". Other descriptions are "pééehpééeh-ili, dew-dlee-ew" and "pééa" respectively.
ID text from Wikipedia, CC BY-SA 4.0
Sooty Tyrannulet
Serpophaga nigricans
The sooty tyrannulet is overall a dark grey colour, with a brownish tinge to its upperparts, paler underparts, and the top of its head being somewhat darker. It has a white strip on its crown which is usually only partially visible, and its chin is whitish. On its wings it has two pale grey wingbars, and the flight feathers closest to its body are whitish. Its tail is black. It has brown irises, a black beak, and black legs. There is no difference between males and females, and there the juveniles have not been described. The sooty tyrannulet averages 118–127 mm (4.6–5.0 in) in total length.
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: Grey Monjita and Sooty Tyrannulet.