Spiders of Wisconsin

Common Spiders

• One of the common spiders found in Wisconsin that is also found throughout the U.S. is the American house spider. These spiders create typical cobwebs in corners like those you might see in Halloween decorations.

  Insect Identification indicates that the comb-clawed spider is the most commonly found spider in homes in the country. They are named for the combs on their feet which they use to throw strands of their web at prey. They are found in a variety of colors.

Outdoor Spiders

• Among the outdoor spiders of Wisconsin, the black and yellow garden spider is typically found in gardens and woods, identified by its yellow and black abdomen.

  The grass spider builds web funnels in grass.

  The venusta orchard spider is colorful, sometimes with red, yellow or orange coloring at the tip of its abdomen. They usually make their homes in trees or shrubs.

  The wolf spider can be found under logs or stones and at times are found in homes.

Runners and Jumpers

• The North American jumping spider and the tan jumping spider are able to make silk, but ambush their prey rather than using a web to catch it. This type of spider often startles humans because of its jump. The tan jumping spider is known to be curious about humans, but usually does not bite.

  The running spider, with a head and abdomen that are reddish in color and light-colored legs, uses its speed to catch its prey.

Northern Black Widow

• Although Venombyte reports that the northern black widow is found in Wisconsin, the University of Minnesota Extension notes that it is rare in the upper Midwest. They usually hide in dark or out-of-the-way locations such as attics, sheds and stacks of firewood. They are identified by their red hour-glass marking on the belly. The bite is usually immediately painful and consists of two red puncture marks. Its venom can cause dizziness, headache, breathing difficulties and abdominal and back pain. Although rarely fatal in health adults, it is serious for those in poor health and children. An antidote can be administered as a treatment.