A taxonomic order of birds that includes all ducks, geese, and swans, characterized by specialized adaptations for aquatic life.
From Latin 'anser' (goose) plus '-formes' (having the form of), creating a taxonomic order name meaning 'goose-like birds,' a classification system developed in modern ornithology.
Every duck you've ever seen, every swan, every goose—they're all lumped into Anseriformes, one of the most successful bird orders with hundreds of living species adapted to wetlands worldwide.
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