Storks are large, long-legged, long-necked wading birds with long, stout bills. Storks dwell in many regions and tend to live in drier habitats than the closely related herons, spoonbills and ibises; they also lack the powder down that those groups use to clean off fish slime. Bill-clattering is an important mode of communication at the nest. Many species are migratory. Most storks eat frogs, fish, insects, earthworms, small birds and small mammals. There are nineteen living species of storks in six genera. Storks are heavy, with wide wingspans. Their nests are often very large and may be used for many years. Storks were once thought to be monogamous, but this is only partially true. They may change mates after migrations, and may migrate without a mate.
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