Painter in oil notable for his interest in wildlife, and writer, born in Weybridge, Surrey. After early years in Australia his education continued at Oundle; served five years in the Royal Air Force; then had 15 years with the family aviation business as salesman and pilot, always painting in his spare time. As a small boat sailor he published two books, Tidelines and Wake, and represented Great Britain in international dinghy meetings. Gradually relinquishing aviation commitments he joined the BBC Television series Animal Magic and illustrated several bird books. Shackleton worked extensively as a naturalist on the ship Lindblad Explorer, mainly in the Antarctic, also handling film commentary assignments. In the late 1970s/early 1980s he presented Animals in Action for Survival, Anglia Television.