Eight Legs, Neighbors: Navigating Desert Spiders in Our Community

What has eight legs but isn’t an insect? If you guessed a spider, you are correct. While these eight-legged arachnids frequently trigger fear, the vast majority of local species are entirely harmless to humans. In fact, out of roughly 4,000 spider species found across the United States, only a small handful pose any real threat to our safety.

Spiders are unique creatures characterized by two distinct body parts the cephalothorax and the abdomen along with eight legs and fangs used to deliver venom. They are famous for their ability to produce various types of silk for capturing prey or spinning intricate webs. As they grow, spiders must periodically shed their exoskeleton, a molting process during which they are temporarily vulnerable.

Knowing which spiders share our desert environment helps us stay safe and keep our homes comfortable.

Here is a quick guide to six common species you might spot around the property:

Common Desert Spiders to Know

• Black Widow Spiders (Latrodectus mactans)
  • Identification: Identifiable by their shiny black bodies and a signature red hourglass marking on the underside of the abdomen. Females are larger and more dangerous than males.
  • Habits: They typically build irregular, messy webs in undisturbed areas, such as the back of sheds, storage spaces, or woodpiles.
• Wolf Spiders (Lycosidae)
  • Identification: Large, hairy, and capable of growing up to two inches, these spiders are usually brown or tan with distinct stripes.
  • Habits: Unlike many others, wolf spiders hunt their prey on the ground rather than using webs. Females are often seen carrying their egg sacs or spiderlings on their backs.
• Tarantulas (Aphonopelma chalcodes)
  • Identification: As the largest spiders in Arizona, tarantulas can reach up to six inches in size.
  • Habits: Despite their intimidating appearance, they are docile and rarely pose a threat to humans. If provoked, they may use their large fangs or flick irritating hairs from their abdomen as a defense mechanism.
• Orb Weaver Spiders (Araneus diadematus)
  • Identification: This group varies greatly in appearance, often featuring large, colorful abdomens in shades of yellow, orange, brown, or black. They grow up to an inch in size.
  • Habits: They prefer outdoor environments like trees and gardens. You may frequently spot their classic circular webs on porches or near exterior lights.
• Jumping Spiders (Salticidae)
  • Identification: These small spiders range from 1/8 to 3/4 of an inch, featuring compact bodies, large eyes, and varied markings.
  • Habits: Entirely harmless to humans, they are highly mobile and are known for their ability to jump up to 50 times their body length. They can be found in almost any environment.
• Southern House Spider (Kukulcania hibernalis)
  • Identification: Covered in fine, velvety hair, the females are typically black while the smaller males are brown.
  • Habits: Females can lay up to 200 eggs in a silk sac, which they guard diligently. Their mouthparts are generally too small to penetrate human skin, making them entirely harmless.

Proactive Tips for a Spider-Free Home

Spiders are naturally drawn to places where they can find an easy meal. To significantly reduce spider activity around your home, use these quick pest-prevention strategies:

• Switch Your Outdoor Lighting: Standard exterior lights attract moths, beetles, and other flying insects that spiders love to eat. Consider minimizing exterior lighting or switching to yellow “bug” lights to keep those insects away.
• Clear Food Sources: By eliminating the insects that serve as their primary food source, spiders will naturally seek out other areas to inhabit.
• Maintain Your Space: Regularly clear away old webs around porches, doorways, and eaves to discourage spiders from rebuilding.

Need a Hand? If spiders continue to be a concern around your property, professional help is available. You can reach out to Rick’s Pest Control at 520-399-9005 to help safely remove spiders and other unwanted arachnids from your home.