Roger Geoffrey Clarke (8 July 1952 – 28 January 2007), was an English ornithologist and world authority on harriers and other birds of prey.

[1] He was educated at Bedford Modern School and later qualified as a Chartered Accountant which he practiced for the rest of his life while still pursuing his main interest as an ornithologist.

[1][2][3] Clarke was said to have been 'vaguely interested in birds from his youth' but he was keener on playing lead guitar in a rock band until hearing damage ended his musical career.

[1] The thesis for Clarke's PhD in biological sciences, awarded by the University of Liverpool in 1999, was on bird of prey feeding ecology.

[1] Clarke's reputation took him to India to study the world's largest harrier roosts for the Bombay Natural History Society.