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
Lemon-chested Greenlet
Hylophilus thoracicus
The lemon-chested greenlet is 10 to 13 cm (3.9 to 5.1 in) long and weighs 11 to 14 g (0.39 to 0.49 oz). The sexes have the same plumage. Adults of the nominate subspecies H. t. thoracicus have an ochraceous olive forehead, a dull grayish olive crown, and a wide grayish nape collar. They have grayish lores and sides of the head with a greenish tinge on the ear coverts. Their upperparts are bright olive that often has a yellowish tinge. Their wings' coverts and flight feathers are dull blackish gray with wide bright olive to yellowish green edges on the latter. Voice: The lemon-chested greenlet's song is a "very high, rapid series of 10-15 upslurred tu-Weéet notes". Its call is a "rich, whistled where-it sometimes doubled ".
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 Lemon-chested Greenlet.