- Aperture Users
- Backpacking
- Canon DSLR User Group
- Cladonias of the World
- flower power
- Jasper Ridge Biological Preserve Plants
- Juncos, Juncos, and more Juncos!
- Landscape
- Midpeninsula Regional Open Space
- Mint Family...Lamiaceae
- Native Habitat Restoration Projects
- Panasonic Lumix FZ1000 Fan Club
- Purisima Creek Redwoods Open Space Preserve
- silver
- Snakes eating in nature
- Systematic Botany (not for "pretty flower images")