カマバネヨタカ Eleothreptus anomalus

While perched, appears to be an unassuming nightjar: rather small, short-tailed, and largely gray with dark brown spots. In flight, males are spectacular, with unique flight feathers forming the “sickle” wing shape. Females lack these modified wing feathers. Usually found close to water, around gallery forest; in some areas also in grassland and marshes. The call is a repetition of very subtle “chip” notes.