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Thames swans: ceremony and conservation

Swan Upping is an annual survey and health check on part of the Thames.

A painted illustration of a white swan on a quiet river among reeds
AI illustration · details

RoyalBea · AIAn imagined scene, not a particular swan or documentation of Swan Upping.

Swan Upping is an annual survey and health check on part of the Thames. Cygnets are weighed, measured and examined for injuries, including those caused by discarded fishing tackle. The ceremony is also conservation fieldwork.

The Crown retains a right to claim unmarked mute swans in open waters, exercised mainly on particular Thames stretches. This is narrower than the claim that the King owns every swan. The Vintners and Dyers livery companies also hold historic rights. Their cygnets receive identifying rings according to parentage, while Crown birds remain unmarked. A population figure needs a separately dated survey report.

Editorial notes2026-10-30

An institutional explanation of the tradition; numbers and dates require the relevant year's report.

Reviewed with AI assistance. The stated claims and choice of sources were examined; this is not independent academic peer review or a guarantee that no errors remain.

Materials used in the review

Sources and further research

  1. Thames swans: ceremony and conservation · institutional source

    Swan Upping combines Crown tradition with wild-bird health checks.

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