Roy Henry Dennis (born 1940) is a British conservationist.
After school he spent time at bird observatories on the islands of Lundy and Fair Isle where he met and worked with ornithologist George Waterston, who attempted to reintroduce the white-tailed eagle to Britain in the 1960s.
[3] Dennis has worked in the Highlands and islands of Scotland since 1959,[4] and has been involved in reintroducing white-tailed eagles, red kites and beavers there.
[3] He ran a project restoring the osprey population at Strathspey, where he worked as the RSPB's Highland officer, and oversaw the management of nature reserves including Loch Garten.
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