Charles Frederick Tunnicliffe, OBE, RA (1 December 1901 – 7 February 1979)[1] was an internationally renowned naturalistic painter of British birds and other wildlife. He spent most of his working life on the Isle of Anglesey. He is popularly known for his illustrations for the novel Tarka the Otter.

https://en.wikipedia.org/wiki/Charles_Tunnicliffe