Since 1972 Mark Cocker has been a member of a community of obsessional people, almost all male, who sacrifice most of their spare time, a good deal of money, sometimes their chances of a partner or family, even occasionally their lives, to watch birds. Birders is the story of this community, of its characters, its rules, its equipment and its adventures - many of which are hilariously funny, Birders is also a work of love - the story of what birds can do to the human heart.