Masked Water Tyrant

The masked water tyrant is 14.5 to 15 cm (5.7 to 5.9 in) long. The sexes have the same plumage. Adults are mostly white. They have a black stripe through the eye (the eponymous mask), a brownish gray tinge to the back, black wings, and a black tail with white feather tips. They have entirely white underparts. Subspecies F. n. atripennis has blacker wings than the nominate with white fringes on the tertials; the amount of white is variable. Both subspecies have a dark iris, a black bill, and black legs and feet. Voice: The masked water tyrant's call in Brazil is a "high, sharp peep". In Ecuador it is described as "a distinctive sharp kirt!" that is sometimes doubled and often given in flight. "Pairs sometimes chatter together." The species' song is "a repeated, soft dewdelewdel-dewdel".