Bar-crested Antshrike
Thamnophilus multistriatus
The bar-crested antshrike is 15 to 16.5 cm (5.9 to 6.5 in) long and weighs 21 to 23 g (0.74 to 0.81 oz). Members of genus Thamnophilus are largish members of the antbird family; all have stout bills with a hook like those of true shrikes. This species exhibits marked sexual dimorphism though both sexes have a crest. Adult males of the nominate subspecies T. m. multistriatus are almost entirely plumaged with alternating black and white bars, including their crest. The exception is their face and throat, which are streaked black and white. Voice: The bar-crested antshrike's song is "much like Barred Antshrike but lazier with marked acceleration at end; typically 6-10 notes, dū, dü dü dü du du-du-da'da".
ID text from Wikipedia, CC BY-SA 4.0
Dot-winged Antwren
Microrhopias quixensis
The dot-winged antwren is 10 to 12.5 cm (3.9 to 4.9 in) long and weighs 7.5 to 11.5 g (0.26 to 0.41 oz). The species has a long graduated tail. The sexes have different plumage. Adults of the nominate subspecies M. q. quixensis are mostly black. They have a partly concealed white patch between their shoulders. Their greater wing coverts have large white tips and the other coverts smaller ones. Their wing's underside shows additional white areas. Their flight feathers are dark gray with a brown tinge. Voice: The dot-winged antwren's song varies among the subspecies and sexes but is generally "an accelerating series of notes that shorten in length". It is described as a "slightly accelerating tip-tip-Tip-Tip-Tip-Tip-Tip-Tip-teu-teu-teu-teu'teu" in northern Central America and "a series of high, fast notes, which rise initially in pitch and intensity before descending" in Costa Rica.
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: Bar-crested Antshrike and Dot-winged Antwren.