Caves & Karst
- Subterranean Ecology Institute
- Société Internationale de Biospéologie (International Society of Subterranean Biology)
- Cave Invertebrate Specialist Group, Species Survival Commission of the International Union for Conservation of Nature (IUCN)
- National Speleological Society
- National Cave and Karst Research Institute
- International Union of Speleology
- Karst Information Portal
- Karst Waters Institute
Illinois
- Illinois Bat Conservation Program
- Illinois Speleological Survey
- Illinois Endangered Species Protection Board
- Illinois State Academy of Science
Miscellaneous natural resource, conservation, wildlife, bat, and insect links:
- Natural Areas Association
- Clifftop NFP
- The Wildlife Society
- Midwest Bat Working Group
- White-Nose Syndrome.org
- Bat Conservation International
- The International Heteropterists’ Society
- The Xerces Society for Invertebrate Conservation
- Entomological Society of America
- Bugguide
- The Lepidopterists’ Society
- Moth Photographers Group
- iNaturalist