William Buckler (13 September 1814 in Newport, Isle of Wight – 9 January 1884 in Lumley near Emsworth) was an English painter and entomologist who specialized in Lepidoptera.
Buckler trained at the Royal Academy and began a career as a portraitist and watercolorist, practising first in Portman Square, London, and then from the 1860s in Emsworth.
When the popularity of photography made portraiture unprofitable, he turned to natural history illustration.
[2] In 1857, he became an illustrator of The Larvae of the British Butterflies and Moths edited by Henry Tibbats Stainton and George Taylor Porritt, which was published by the Ray Society.
He formed a close collaboration with Reverend John Hellins and the two raised caterpillars for the artist to paint.