Planalto Tyrannulet

The planalto tyrannulet is 11 to 11.5 cm (4.3 to 4.5 in) long. The sexes have the same plumage. Adults of the nominate subspecies have dull grayish-olive to brownish-olive crowns, napes, backs, and rumps, with the crown being the grayest part. Their lores, supercilium, partial eyering, and lower face are whitish with a dark stripe through their eye. Their wings are dusky with pale olive to whitish edges to the flight feathers and the ends of the coverts; the latter show as two pale bars on the closed wing. Their tail is dusky. Voice: The planalto tyrannulet's song differs geographically. In the southeastern part of its range it sings "a slow series of 3-4 slightly descending, plaintive 'puh-puh--' minor-key notes". Elsewhere it sings a "slightly higher-pitched and more distinctly descending series of 3 more major-keyed notes".