The head and neck naked; bill stout, blunt, the nostril linear ; tibia half-naked; tarsus reticulate; toes long, bordered by a membrane that forms a web towards the base, especially between the 3rd and 4th toes. Tail moderate, of 12 feathers. Tertiaries in the breeding-season with elongate plumules forming ornamental plumes.
This genus, of which the Sacred Ibis is the type, ranges from Africa through India and the Malay countries to Australia. One species is Indian.