This is part of a two-volume reference work on rare and endangered biota of Florida. Each volume is arranged in order of species status: extinct, extirpated, endangered, threatened, rare and special concern. The account of each species contains data categories of taxonomy, description, population size and trend, history and range of distribution, geographic status, habitat requirements and vulnerability of species and habitat. The review of the environmental situation of the species includes causes of threat, responses to habitat modification, demographic characteristics, key behaviours and conservation measures that have been taken and those proposed for the future. Tables list species currently on the FCREPA list with their status. Also included are the current designations of status by the US Fish and Wildlife Service and the Florida Game and Fresh Water Fish Commission. Of the 43 mammals listed in this volume, four subspecies have been recognized as extinct since the publication of the original edition. In the case of the endangered Florida panther, despite many conservation measures, experts predict it will be extinct in 30-35 years without the radical intervention of captive rearing and re-establishment of new populations. Volume II focuses on fishes.