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Arizona Brown Spiders

Loxosceles arizonica
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arizona brown spider

What do Arizona brown spiders look like?

Arizona Brown Spider is a species of brown recluse spiders found in Arizona. It has two body parts and eight legs, a distinct violin shaped marking on top of the head, 3 sets of eyes, 1/4 to 1/2 inches long with long thin legs, and yellowish to light brown color.

The venom of a black widow spider is a neurotoxin and is used as a defense. Black widow spiders do not bite humans instinctively. The black widow spider bite can cause severe pain. Young children and the elderly are especially susceptible to a severe reaction to a black widow spider bite.

Most other spiders in our area do not pose a significant risk, however, a spider bite can be unpleasant and irritate the skin.

When are arizona brown spiders most active?

Very Active
Not Active

Habits of the Arizona brown spiders

  • Diet: Small insects caught in webs or hunted.  Can survive 6-12 months without food.
  • Activity: Hunt at night
  • Preferred Climate: Temperate climate
  • Defense: Toxic bite and violin marking on the head which scares its predators.
  • Cautions: Bite may cause necrosis if enough venom is injected. Consult a physician if bitten by a recluse.
  • Home Invasion: Primarily found outdoors, an Arizona Brown Spider may be seen hiding in cracks or crevices during the day and actively about at night.  It is possible to find their shed skins on surfaces.

Are Arizona brown spiders dangerous?

  • Reddened skin followed by a blister that forms at the bite
  • Mild to intense pain and itching for 2 to 8 hours
  • An open sore that develops a week or more following the bite
  • Some people will even have severe allergic reactions

Where do Arizona brown spiders nest?

Nesting sites are often found in basements, attics, crawl spaces, and closets. You may find activity in drop ceilings and behind baseboards as well. 

Helpful hints 

  • Removal of trash or debris (woodpiles, boxes, tires, etc.) stored around the home.
  • Seal openings in the home that could be entry points.
  • Recommend regular pest control service plan.

Interesting facts about Arizona brown spiders

It is thought that the number of necrotic wounds attributed to brown recluse bites is highly misdiagnosed.

How do I get rid of spiders?

Getting rid of spiders can be a tricky task as they are elusive creatures. That's why our service includes everything necessary for one fee.

Our treatment method consists of the following:

  • Detailed inspection of the entire structure identifying areas of activity and entry points.
  • A treatment around the foundation, garage, eaves, soffits, etc is applied on the exterior. Any accessible webs will be removed.
  • On the inside, our technician will apply an all natural dust and limited amounts of a liquid material in areas where the spiders are or may travel.
  • We may also install Pest Monitor Stations which have a glue board in them to capture and monitor the area.
customer for brown recluse spider control in cochise county


‟I bought a home, sight unseen (I trusted a VA inspector) in rural Cochise County, AZ.
After moving in I quickly discovered that the home was INFESTED with vermin and BROWN RECLUSE SPIDERS!

NW Exterminating installed ‘Desert Guard’ and that took care of ALL of the vermin, and, after a few treatments of Spider Power-Dusting in my crawl space I am free of dangerous spiders!

Dave K.
Cochise County, AZ
Northwest Exterminating received an average rating of 4.6 out of 5 stars from 461 reviews. 4.6 Read Google Reviews

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