The spitting spider (Scytodes thoracica) is one of the most unusual spiders in Arizona. It captures prey by spitting a venomous, sticky silk from its fangs at speeds up to 30 meters per second, pinning the prey to the surface before biting it. The spider's oversized cephalothorax houses the enlarged venom/silk glands responsible for this unique hunting method. Spitting spiders are small (1/4–3/8 inch), slow-moving, and have a distinctive domed, spotted cephalothorax. They are found in sheltered indoor locations — under furniture, in closets, and in undisturbed corners — where they hunt other small spiders and insects at night. Spitting spiders are completely harmless to humans and are actually beneficial, as they prey on other spiders including sac spiders.
👁Warning Signs
Small, slow-moving spider with a distinctive domed, spotted cephalothorax. Found in sheltered indoor locations. Prey pinned to surfaces with sticky silk.
⚠Health & Property Risks
Not medically significant. Completely harmless to humans.
Prevention Tips
Not a pest requiring control. Beneficial predator of other indoor spiders.
🛡Professional Treatment
No treatment necessary.
Frequently Asked Questions — Spitting Spider
The Spitting Spider (Scytodes thoracica) is pale tan to yellow with dark spots on the cephalothorax and abdomen and typically measures 1/4–3/8 inch body. The spitting spider (Scytodes thoracica) is one of the most unusual spiders in Arizona. It captures prey by spitting a venomous, sticky silk from its fangs at speeds up to 30 meters per second, pinnin.
The Spitting Spider is generally low-risk, but caution is still advised. Not medically significant. Completely harmless to humans.
In Arizona, spitting spiders are most often encountered in the following situations: Small, slow-moving spider with a distinctive domed, spotted cephalothorax. Found in sheltered indoor locations. Prey pinned to surfaces with sticky silk.
The Spitting Spider is most active during: Year-round indoors. Arizona's warm desert climate can extend activity periods compared to other states, so year-round vigilance is recommended in the Phoenix metro and surrounding areas.
Not a pest requiring control. Beneficial predator of other indoor spiders.
No treatment necessary.
If you spot a Spitting Spider indoors, avoid handling it directly. Capture it under a glass if possible for identification, or photograph it for reference. Contact Pest Control Bros for a professional inspection — we can confirm the species, assess the severity of the infestation, and recommend targeted treatment.
Dealing with Spitting Spider?
Pest Control Bros LLC serves Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa. No contracts. Free inspections. Same-week service.
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