Planalto Tyrannulet

The planalto tyrannulet (Phyllomyias fasciatus) is a species of bird in subfamily Elaeniinae of family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, Brazil, and Paraguay. == Taxonomy and systematics == The planalto tyrannulet has three subspecies, the nominate P. f. fasciatus (Thunberg, 1822), P. f. caerae (Hellmayr, 1927), and P. f. brevirostris (Spix, 1825). P. f. caerae might merit recognition as a separate species. == Description == 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. Their throat is whitish and their underparts yellow with an olive wash on the breast and sides. Subspecies P. f. brevirostris has darker olive upperparts than the nominate, with pale olive (not whitish) on the wings and…