Black-bellied whistling duck, Dendrocygna autumnalis (A).These are adapted to an aquatic life, possessing webbed feet, an oily covering on their feathers to shed water, and bills adapted to their feeding needs. (D) Domesticated - a species which is domesticated in the Galápagos but not naturalised.(I) Introduced - a species introduced to the Galápagos as a consequence, direct or indirect, of human actions.(ES) Endemic subspecies - a subspecies found only in the Galápagos.(EB) Endemic breeder - a species which nests only in the Galápagos but is found elsewhere in the non-breeding season.(E) Endemic - a species found only the Galápagos.(A) Accidental - a species that rarely or accidentally occurs in the Galápagos.Untagged species are common non-endemic residents, migrants, or seasonal visitors. The following tags are used to define several categories of occurrence. Unless otherwise noted, this list's taxonomic treatment (designation and sequence of orders, families and species) and nomenclature (common and scientific names) are those of the South American Classification Committee (SACC) of the American Ornithological Society. In addition, 85 of the species are accidental, five were introduced to the islands, and five are domesticated. Of them, 31 are endemic, three nest only in the Galápagos, and virtually the entire population of a fourth nests there. This list of birds recorded in the Galápagos Islands includes species documents from the Galápagos Islands of Ecuador, where 185 species have been documented as of February 2019.
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