Grey Antwren
Myrmotherula menetriesii
The grey antwren is 8.5 to 10.5 cm (3.3 to 4.1 in) long and weighs 8 to 9 g (0.28 to 0.32 oz). It is a smallish bird with a short tail. Adult males of the nominate subspecies M. m. menetriesii are almost entirely bluish gray, with lighter underparts than upperparts. Their wing coverts have white tips and a black bar just above them. Their tail feathers have narrow white tips. The center of their throat and upper breast are black, sometimes with gray tips on the throat feathers. Adult females have olive-tinged gray upperparts with somewhat darker wings. Voice: The grey antwren's song in Brazil is described as an "ascending series of 6-8 eerie, two-syllabled 'wueeih' notes". In Ecuador it is "a wavering series of 10-12 'ree' or 'shree' notes that rise in pitch and accelerate a bit". The species' calls are "multi-noted include higher-pitched abrupt notes and lower, slightly longer ones in varying combinations"; all are delivered rapidly.
ID text from Wikipedia, CC BY-SA 4.0
Pacific Antwren
Myrmotherula pacifica
The Pacific antwren is 9 to 10 cm (3.5 to 3.9 in) long and weighs 8.5 to 10 g (0.30 to 0.35 oz). It is a smallish bird with a tiny tail. Adult males have a black and white streaked face. Their crown, back, and rump are black with white streaks. They have a narrow white patch between the shoulders. Their tail is black with white edges and tips to the feathers. Their wings are black with white tips on the coverts and white edges on the flight feathers. Their throat, breast, and belly are white and their flanks and crissum grayer. Black streaks extend from the throat to the flanks and belly. Voice: The Pacific antwren's song is "a fast, spritely chipper that rises slightly in pitch, e.g., 'chee-chee-chi-chich-ch-ch-ch-ch-ch-ch' ". Its calls include "chee-pu", "chee-cher", and "a strident, evenly pitched 'chrreee-chrreee-chrreee-chrreee!' ".
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 Antwren and Pacific Antwren.