Description: Some people love them, while others fear them. However, one thing is certain: spiders play an essential part of a healthy ecosystem. They are key predators of insect pests--like fleas and mosquitoes--and they serve as prey for beloved animals such as birds. If you see spiders in your area, keep this convenient guide close at hand. Designed for ease of use, the spiral-bound booklet is organized by type of spider web for quick identification. Narrow your choices by the web you see, and view just a few spiders at a time. Plus, you'll also find sections for spiders that don't utilize webs. The professional photographs showcase more than 150 species.