Laurent Tillon is head of biodiversity at the National Forestry Office in charge of drawing up inventories of forest fauna, especially mammals and batrachians. As a specialist in bats he also closely observes their own woodland presence. He lives in the heart of Rambouillet Forest and has already published the popular Et si on écoutait la nature? (Payot, 2018) which delighted readers throughout France. Laurent Tillon is a passionate public speaker who loves sharing his subjects of predilection.