Henley on Thames, UK 19th July 2017. The Queens Swan Uppers arrive at Henley on Thames on the third day of the swan census. Swan Upping is an annual 5 day swan census which dates back 800 Swan Uppers weigh and measure the cygnets and check them for any signs of injury, commonly caused by fishing hooks and line. :Credit claire doherty Alamy/Live News.

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Photo credit: © claire doherty / Alamy / Afripics
License: Licensed
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Keywords: annual, barbour, bird, census, ceremony, conservation, cygnet, david, management., marking, monitoring, mute, navigation, ornithology, protection, river, royal, swan, swans, thames, traditional, uppers, upping, watching, waterbird, waterfowl, wildlife