Ciconiidae is the only extant family in the order Ciconiiformes. Storks are large, long-legged, long-necked wading birds with long, stout bills. They are found in many regions and tend to live in drier habitats than herons, spoonbills and ibises; they also lack the powder down that those groups use to clean off fish slime. Storks have no syrinx and are mute, giving no call; bill-clattering is an important mode of communication at the nest. Many species are migratory.