Grey-eyed Greenlet
Hylophilus amaurocephalus
The grey-eyed greenlet is 12.5 to 13 cm (4.9 to 5.1 in) long. The sexes have the same plumage. Adults have a chestnut-brown forehead and crown and a pale grayish supercilium, and is mottled gray-white around the eye and on the ear coverts. Their nape and upper back are dull gray-brown and their lower back, shoulders, and rump are green-tinged gray-brown. Their wings are gray-brown with thin greenish edges on the outer webs of the primaries and secondaries. Their tail is gray-green with brighter edges on the feathers' outer webs. Voice: The grey-eyed greenlet's song is a "high, rather harsh see-see or te Teé-te Teé-te Teé and many other variations".
ID text from Wikipedia, CC BY-SA 4.0
Rufous-crowned Greenlet
Hylophilus poicilotis
The rufous-crowned greenlet is about 12.5 cm (4.9 in) long and weighs 9 to 12 g (0.32 to 0.42 oz). The sexes have the same plumage. Adults have a bright chestnut-brown forehead and crown and mottled grayish black ear coverts. Their nape, upper back, and shoulders are olive-green and their lower back and rump are a brighter green. Their wings are dull grayish black with thin greenish edges on the outer webs of the primaries and secondaries and yellow-green edges on the inner webs of the tertials. Their tail is grayish green with brighter greenish edges on the feathers' outer webs. Voice: The rufous-crowned greenlet's song is a "rapid, high teweét-teweét- - (3-6 x) or rapid swee-swee- - (4-5 x)". There is much variation throughout the species' range. When it groups it makes chek or chi-chek contact calls.
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-eyed Greenlet and Rufous-crowned Greenlet.