Plain Antvireo
Dysithamnus mentalis
The plain antvireo is 10 to 13 cm (3.9 to 5.1 in) long and weighs 12 to 16 g (0.42 to 0.56 oz). It is a rather chunky bird with a large head and short tail. Adult males of the nominate subspecies D. m. mentalis have a dark gray forehead and crown and blackish ear coverts. Their upperparts are grayish olive with a hidden white patch between the scapulars. Their wings are dark grayish olive with olive edges on the flight feathers, white tips on the grayish olive greater coverts, blackish median coverts with white tips, and blackish lesser coverts. Voice: The plain antvireo's song is generally a "short...series starting with a few...evenly paced, countable notes at same pitch, notes then gradually becoming more abrupt and dropping in pitch, ending in accelerating roll". Authors have described it as a "high nasal watje watjwatwaturururu sounding as a rattle" and as "a nasal barking series...weu-weu-weu-Weu-Weu-Weu-Weu-Weu'weu'wru'weu'u'u'u".
ID text from Wikipedia, CC BY-SA 4.0
Streak-crowned Antvireo
Dysithamnus striaticeps
The streak-crowned antvireo is 10 to 11 cm (3.9 to 4.3 in) long and weighs 15 to 17 g (0.53 to 0.60 oz). Adult males have a dark gray forehead, crown, and nape with heavy grayish white streaking. Their ear coverts are blackish. Their upperparts are grayish olive with a hidden white patch between the scapulars. Their flight feathers are dark grayish olive with wide buffy grayish edges; their wing coverts are blackish with white tips. Their tail is dark grayish olive with narrow white tips on the feathers. Voice: The streak-crowned antvireo's song is "a long...series in which notes initially rise in pitch and intensity, remain constant, then gradually shorten, weaken and descend in pitch". It has been written as "kepkepkepkepkepkrrrrrrr" and "peu-peu-peu-Peu-Peu-Peu-Pip-Pip-Pip-Pip'Pip'Pip'Pip'Pip'peu". Its calls include "soft single or double whistles" and a "short 'chirr' ".
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: Plain Antvireo and Streak-crowned Antvireo.