Brown Recluse Spiders like dark spaces and woodpiles and cool areas in the attic. The affected skin actually dies. The brown recluse spider is the most dangerous spider in the USA.
A person can die from its bite. They like the darkness and tend to live in storage sheds or attics or other areas that might not be frequented by people or light.
If you need to be in your attic turn on a light and leave it on for about 30 minutes before you go in to do your work.
Since the violin pattern is not diagnostic, and other spiders may have similar markings (such as cellar spiders and pirate spiders), for more assurance in identification it is imperative to examine the eyes. Most spiders have eight eyes; recluse spiders have six eyes arranged in pairs (dyads) with one median pair and two lateral pairs. Only a few other spiders have three pairs of eyes arranged in this way (. Recluses have no obvious coloration patterns on the abdomen or legs, and the legs lack spines. The abdomen is covered with fine short hairs that, when viewed without magnification, give it the appearance of soft fur. The leg joints may appear to be a slightly lighter color.