Spot-billed Ground Tyrant

The spot-billed ground tyrant is 14 to 15.5 cm (5.5 to 6.1 in) long and weighs 11 to 17 g (0.39 to 0.60 oz). The sexes have the same plumage. Adults of the nominate subspecies have an olive-brown crown, a whitish to buffy white supercilium and spot above their lores, a dusky line through the eye, and an olive to gray patch on the ear coverts on an otherwise whitish to dusky face. Their nape and back are olive-brown. Their wing coverts are olive-brown with buff to rufous edges. Their remiges are dusky to brownish with thin pale rufous edges. Voice: The spot-billed ground tyrant is the most vocal species in its genus. Males sing during the flight display, "a prolonged series of Pit notes accelerating slightly into a higher-pitched flourish ending with two short, clear whistles: Pi-tew!". It also makes separate pit, pip, and pew calls.