(Geronticus eremita)
The northern bald ibis is a large,glossy black bird,70–80 cm (28–31 in) long with a 125–135 cm (49–53 in) wingspan and an average weight of 1.0–1.3 kg (35–46 oz).The plumage is black,with bronze-green and violet iridescence,and there is a wispy ruff on the bird's hind neck.The face and head are dull red and unfeathered,and the long,curved bill and the legs are red.In flight,this bird has powerful,shallow,and flexible wing beats.It gives guttural hrump and high,hoarse hyoh calls at its breeding colonies,but is otherwise silent.