- U.S. Fish and Wildlife Service Endangered Species Program@
- U.S. Endangered Species Act of 1973 (9)
- Wild Ones
- Education project, with curriculum resources, of the Wildlife Preservation Trust International. - Species at Risk in Canada
- Includes a species database and recovery efforts. - In the Footsteps of Lewis & Clark: Species at Risk
- Sierra Club article about the endangered plant and animal species of the American West and the observations Lewis and Clark made in their travels. - Endangered Species Update
- Published by the School of Natural Resources and Environment at the University of Michigan, Endangered Species Update covers the scientific and political aspects of current threatened and endangered animal and plant protection efforts. - EE-Link: Endangered Species
- Compendium of information about endangered species including factsheets, searchable databases, images, policy, and legislation. - Endangered Endemic Species of the Philippines
- Comprehensive list with information about each species. - State of Texas Threatened and Endangered Species Listings
- List of mammals, fishes, reptiles, amphibians, plants, birds, and invertebrates from Texas Parks and Wildlife. - (AU) Australian Government Department of the Environment and Heritage - Threatened Species and Ecological Communities
- Identifies and lists Australia's threatened flora and fauna as well as its threatened ecological communities. - (AU) Biodiversity Information Manager
- Tool for the collection and dissemination of current information about biodiversity as it relates to the Convention on Biological Diversity and the National Strategy for the Conservation of Australia's Biological Diversity. - Endangered! Exploring a World at Risk
- Companion site to an American Museum of Natural History exhibition covering endangered animals and habitats, causes, and more. - Alberta Species at Risk Program
- Includes status reports, information on recovery programmes, and prevention strategies. - Wisconsin's Threatened and Endangered Species
- Species factsheets from the Wisconsin Department of Natural Resources. - Endangered Species Guide
- Learn about endangered species and how you can make a difference in their lives. - IUCN Red List of Threatened Species
- Includes a video presentation, photo gallery, statistics, and resources related to the IUCN Red List of Threatened Species. - IUCN Red List of Threatened Species Database
 - Browse the IUCN Red List of Threatened Species searchable database of species that are currently endandered or close to extinction. Includes complete information about each species and what conservation actions have been taken.
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