Trees & Native Plants
- Tree Identification Guide (Arbor Day Society)
- Eastern & Central Trees – by common name (Arbor Day Society)
- Woody Plant Identification (Univ. of TN)
- Landscaping with Native Plants – Middle TN (TN Exotic Pest Plant Council)
- Native Plant List – Kentucky & Tennessee (Plant Native)
Wildflowers
- Guide to Tennessee Wildflowers
- Index of Tennessee Wildflowers – by common name
- Index of Wildflowers from other States – by common name
- Wildflower Identification Tips
Poisonous Plants
- Poisonous Plants of the Southern U.S. (Univ. of Tennessee Agriculture Extension)
- Common Poisonous Plants & Plant Parts (Texas A&M)
- How Poison Ivy Works (How Stuff Works)
- Poisonous Mushrooms (Missouri Dept. of Conservation)
Animals
- On-line Animal Field Guides (eNature)
- Animals & Their Tracks (Beartracker)
- Animal Tracking (ussartf.org)