The Hadada ibis (Bostrychia hagedash), also known simply as the Hadada, is a large and distinctive bird found primarily in sub-Saharan Africa. It is a member of the ibis family Threskiornithidae. Here are some key characteristics and information about the Hadada ibis.Size: Hadada ibises are relatively large birds, with a length ranging from about 76 to 84 centimeters (30 to 33 inches). Plumage: They have a predominantly dark plumage, with glossy black feathers covering most of their body.