An annual swan census in Britain in which mute swans on the River Thames are rounded up, caught, marked, and released.

A person who engages in swan upping.

(diving) to perform a swan dive / (figuratively) to plummet, drop rapidly

(diving) A forward dive performed with an arched back, the legs together, starting with arms outstretched when jumping, bringing them over the head when landing. / A similar movement out of the water.

Alternative form of swan upping

plural of swan dive

A large migratory goose (Anser cygnoides) belonging to the subfamily Anserinae.

A large size of shot used in fowling.

plural of swan goose

plural of swan mussel