swan upping
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English
[edit]![](http://upload.wikimedia.org/wikipedia/commons/thumb/9/9f/Life_on_the_upper_Thames_-_swan-upping_%281875%29.jpg/220px-Life_on_the_upper_Thames_-_swan-upping_%281875%29.jpg)
Noun
[edit]swan upping (countable and uncountable, plural swan uppings)
- An annual swan census in Britain in which mute swans on the River Thames are rounded up, caught, marked, and released.