The Algodones Dunes, also known as the Imperial Sand Dunes, in Imperial County are considered to be the largest sand dune system in California and one of the largest in the United States (California Division of Mines 1952, Miller 1957). Within the Algodones Dunes are several different habitat types which contribute to the biological uniqueness of the area. Few data are available on the avian community of these dunes. The purpose of this investigation was to determine avian species composition, breeding bird densities, bird species diversity, and plant species diversity in the various habitats associated with the Algodones Dunes.