Sanibel Island is one of a kind. With over 60% of the land held in preservation and public hands, Island residents live in harmony with nature. On any given day, it's common to see a wide variety birds, mammals, fish, reptiles and shells. Sanibel has one of the largest concentrations of dolphins. Bird Watchers "flock" to Sanibel and the Ding Darling Wildlife Refuge to encounter thousands of resident and migrating birds. Sanibel's shelling is famous with one Worlds' largest variety of mollusk species living in the surrounding waters. Protected lands continue to increase as property is actively acquired by preservation organizations and placed into land trusts.