The Hadeda is a large (~76 cm long), grey-to-brown species of ibis.
It has a narrow, white, roughly horizontal stripe across its cheeks.
The plumage over the wings has an iridescent purple/green sheen.
The bird has blackish legs and a large grey-to-black bill with a red stripe on the upper mandible.
The upper surfaces of the toes are of a similar red.
Wings are powerful and broad, enabling quick take-offs and easy manoeuvring through dense tree cover.
It has a loud and distinctive haa-haa-haa-de-dah call that is often heard when the birds are flying or are startled, hence the name.
While roosting they produce a single loud haaaa. When foraging, their contact call is a low growl similar to that made by a young puppy.
It is found throughout sub-Saharan Africa in open grasslands, savanna and wetlands, as well as urban parks, school fields, green corridors and large gardens.
Reference: Wikipedia