By Joe Julian, Colorado State University Cooperative Extension agent, Natural Resources and Agriculture
Unlike the Black Widow Spider, the Brown Recluse is not common in the Front Range. In fact, it is extremely uncommon in Colorado. Usually, when we do have an actual specimen in Colorado, it is one that was transported from another state. There is no evidence that the brown recluse is permanently established in the Front Range or is spreading in the region. Unfortunately, when a person has a wound or lesion and the source is unknown, the brown recluse spider is incorrectly blamed. The best way to determine if you have a brown recluse is to capture the spider and have it brought to an entomologist or arachnologist (spider expert) for verification of identification.
Photos: Whitney Cranshaw
© CSU/Denver County Extension Master Gardener 2010
888 E. Iliff Avenue, Denver, CO 80210
Date last revised: 01/05/2010