- US Fish and Wildlife Service - Threatened and Endangered Species Page
- US Fish and Wildlife Service Portland Office - Endangered Species Page
- Oregon Department of Fish and Wildlife - Wildlife Diversity Division's Threatened and Endangered Species Page
- Natureserve - An Online Encyclopedia of Life
- Oregon Biodiversity Information Center - a clearinghouse for information on rare, threatened and endangered plants, animals, invertebrates and ecosystems in Oregon
- Oregon Biodiversity Information Center - Rare, Threatened and Endangered Species of Oregon, 2007.
