best trading platform for options Spider WebWatch is a biodiversity monitoring effort for biologists, naturalists, educators and students of all ages who have an appreciation for North America's native spider fauna. From more than 4,400 species of spiders, 9 were chosen as eight-legged ambassadors for this interactive program. Choose a spider below to learn how to identify it, view its sighting reports, and read any active discussions. You can get started with your own submissions and dig a little deeper into the science of arachnology using the links at right.