A small selection of the many excellent resources that exist which are dedicated to Tennessee Natural History are provided below.
Animals
LEAPS - Tennessee frogs and toads
Tennessee Watchable Wildlife - native animals
Plants
Tennessee Invasive Plant Council - invasive plants
Tennessee Native Plant Society - native plants
Citizen Science
Citizen Science Association - now inviting inaugural members
User's Guide for Evaluating Learning Outcomes from Citizen Science - Developed by the Cornell Lab of Ornithology, free
Environmental Education
Alliance of Natural Resource Outreach and Service Programs (ANROSP) - national network of natural resource education and service programs [TNP is a member]
EE in Tennessee - Environmental Education