Hartlaub's Duck Pteronetta hartlaubii

A large, dark chestnut-colored duck found primarily in sheltered fresh and brackish waters in well-wooded areas. In flight, distinctive bright blue upperwings stand out even along shaded creeks and streams. Widespread in the Afrotropical lowlands, but easy to overlook given its habits and habitat. Primary calls consist of hollow “ko-ko-ko” quacking and occasional wheezy whistles.