Rufous-crowned Greenlet

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.