Spiders are predatory arthropods of insects. Unlike the horror movies, spiders do not attack humans unless provoked to bite by handling, whether intentionally or not. All spiders have 2 body regions like ticks: an unsegmented abdomen and a cephalothorax. Unlike ticks, a spider's abdomen is constricted at the base, but, like ticks, spiders have 8 legs and no antennae. So, if your bug has 8 legs and a constricted abdomen, it's a spider.
These spiders pose no serious health risk to people, although a few people do have an allergic reaction to their accidental bites.
 Philodromid Crab Spider |
These are the main spiders of health concern to citizens of Wyoming.
Minor Concern
 Yellow Sac Spider |
 Hobo Spider |
Major Concern
 Black Widow |
 Brown Recluse |
