Large-billed Antwren
Herpsilochmus longirostris
The large-billed antwren is 12 to 13 cm (4.7 to 5.1 in) long and weighs 12 to 14 g (0.42 to 0.49 oz). As its English name and specific epithet imply, its bill is heavier than those of most other Herpsilochmus antwrens. Adult males have a black crown and nape, a long whitish supercilium, a narrow black streak through the eye, and grayish ear coverts. Their back and rump are gray with a black and white patch between the scapulars and white-tipped black uppertail coverts. Their wings are black with white-tipped coverts and flight feathers with white edges towards the end. Voice: The large-billed antwren's song is a "high, fast, chattering series, rising at start, descending and decelerating at end". Typically the male sings and the female quickly answers. Its calls include a "a rapidly delivered triplet in which notes become shorter and drop in pitch" and an "abrupt downslurred note" like that of several other members of its genus.
ID text from Wikipedia, CC BY-SA 4.0
Rufous-margined Antwren
Herpsilochmus rufimarginatus
The rufous-margined antwren is 10 to 12.5 cm (3.9 to 4.9 in) long. Adult males have a black crown and nape, a wide whitish supercilium, a black stripe through the eye, and black and white or pale yellow mottled ear coverts. Their upperparts are mostly olive-gray with scattered black patches, yellow uppertail coverts, and white tips on their outer scapulars. Their wing coverts are black with white tips; their flight feathers are olive-brown tinged dark gray with bright cinnamon-rufous edges. Their tail is mostly dark gray with white tips on the feathers and an entirely white outermost pair. Voice: The rufous-margined antwren's song is "3‒4 slow-paced notes which rise in frequency, after which a series of fast notes gradually decelerates and drops again in pitch". Pairs often sing in duet. Its most common call is a "melodious whistled note tew" that may be repeated up to five times in a burst or irregularly over a longer period.
ID text from Wikipedia, CC BY-SA 4.0
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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Large-billed Antwren and Rufous-margined Antwren.