Piers Warren is a wildlife film-maker and author living in rural Norfolk. He has walked the African plains with Maasai Warriors, tracked tigers in India on elephant-back, explored the Amazon rainforest, swum with sharks, trekked across Tanzanian deserts on a camel and filmed cheetahs hunting in Kenya. But his favourite place is the North Norfolk coast, where he spends his time capturing the flora and fauna on film … and looking for pawprints in the sand.