PHOTO REFERENCE | |
| Classroom Clipart | A source for royalty free clipart, photos and illustrations. |
| eNature | Sights and sounds of 5,500 species. Thankfully, no smells. |
| Pics4Learning | Copyright friendly images for education. |
| Smithsonian National Zoo | Photo Gallery |
| US Fish and Wildlife | The U.S. Fish and Wildlife Service's online digital media library. |