Black-headed Heron

The Black-headed Heron is a large bird, standing 85 cm tall, and it has a 150 cm wingspan. It is nearly as large as the Grey Heron, which it resembles in appearance, although it is generally darker. Its plumage is largely grey above, and paler grey below. It has a powerful dusky bill.
The flight is slow, with the neck retracted. This is characteristic of herons and bitterns, and distinguishes them from storks, cranes, and spoonbills, which extend their necks. The white underwing coverts are striking in flight.
The call is a loud croaking.