Mark AveryMark Avery has combined bird watching with a career as a biologist. Since graduating from Cambridge University he has studied at Oxford and Aberdeen Universities and worked on Great Tit song, food-hoarding by Marsh Tits, foraging and social beaviour of Bee-eaters and hibernation of pipistrelle bats. Mark joined the RSPB staff in 1986 to work in the Flow Country and is now a Senior Research Biologist for the Society working on scientific aspects of land-use, international and marine issues. Read More Read Less