1, families and genera are different: geese belong to Anatidae and swans belong to Anatidae.

2. Different shapes: the goose has a large body, a high mouth, almost equal head length and width, serrated odontoid process on the maxillary edge, and a streamlined forehead; The swan has a moderate mouth shape, its neck is as long as or longer than its body, and its tail feathers are more than that of the goose.