Description wikipedia

The cinereous tyrant, or cinereous black-tyrant, (Knipolegus striaticeps) is a species of bird in the family Tyrannidae, the tyrant flycatchers. It is found in Argentina, Bolivia, and Paraguay, and as a vagrant to Brazil. The cinereous tyrant is 13 to 13.5 cm (5.1 to 5.3 in) long. Adult males are shades of gray. ("Cinereous" means ash-colored.) They have mostly dark gray upperparts. Their head is darker than their body, giving the appearance of a hood, though the face is blackish gray. Their wings are dusky gray or blackish gray with grayish edges on the inner remiges and thin pale gray tips on the coverts that show as two wing bars. Their tail is dusky with pale outer webs on the outer feathers. Their throat and breast are a duskier gray than their back and their belly is grayish white or whitish with thin dusky streaks. Adult females have a mostly olive-brown head and upperparts with a rufous crown, whitish lores, dusky streaks on the nape, and rufous uppertail coverts. Their wings are olive-brown with white tips on the coverts that show as two wing bars. Their tail is olive-brown with rufous inner webs to the feathers. Their throat and breast are buff with thin gray streaks on the breast. Their belly is whitish. Males have a bright scarlet iris and females a pale brown iris. Both sexes have a black bill and black legs and feet.