Brown recluse spiders are hardly ever seen due to the fact that they love dark secluded areas. These spiders are not native to Colorado, they started appearing about 5 years ago from people moving into the state from Kansas and surrounding states. In the spider world they are known as “hermit’s”. They can live all year round in houses, barns, and even green houses.
Unfortunately these spiders are amoung the most poisonous spiders in the United States.
There are a couple of different ways to identify brown recluse spiders, including but not limited to: counting their legs, these particular spiders have eight legs like most spiders but each leg is covered in fine hairs not spikes. These spiders are light brown in color with dark brown markings all over the body. The younger ones are lighter in color.
They are not a very large spider, only about the size of a quarter including the leg span. The brown recluse does not generally move very fast, they are much more apt to hide than run.
According to Rodney Southern, in his article, How to Identify the Brown Recluse Spider,
Observe the trademark “fiddle” marking on the brown recluse that gives the brown recluse the nickname “fiddle back.” This violin shaped marking points towards the abdomen of the spider, and starts at the head. This is not a foil proof method of identifying all brown recluse spiders however, as the spider is sometimes without the marking due to molting or age.
View the eyes of the brown recluse spider. Where most spiders have eight eyes, the brown recluse has only six. These are arranged in a semi circle in pairs of two. This is not clearly visible unless close up, so it can be dangerous to inspect a live brown recluse in this manner.
For more information on the brown recluse and other spiders in Colorado, visit the Absolute Pest Control web site here.