Hacklemesh weavers (genus Callobius, family Amaurobiidae) are medium-sized spiders that build irregular, tangled mesh webs in rock crevices, under bark, in wood piles, and in other sheltered locations. They are found primarily in Arizona's mountain ranges and higher elevation areas where cooler, moister conditions prevail. Adults are brown to reddish-brown with a robust build and are typically 1/4–1/2 inch in body length. The web has a distinctive bluish-white, cribellate silk that is produced by a special spinning organ (cribellum) and combed into a woolly texture by a comb on the hind legs. Hacklemesh weavers are nocturnal and rarely encountered in typical residential settings in the low desert. They may be found in mountain cabins, wood piles, and rocky terrain in Arizona's higher elevation communities.
👁Warning Signs
Irregular, tangled webs with distinctive bluish-white woolly silk in rock crevices or under bark. Medium brown spider in the web retreat. Found in higher elevation areas.
⚠Health & Property Risks
Not medically significant. Completely harmless.
Prevention Tips
Not a pest requiring control in most Arizona settings.
🛡Professional Treatment
No treatment necessary.
Frequently Asked Questions — Hacklemesh Weaver
The Hacklemesh Weaver (Callobius spp.) is brown to reddish-brown and typically measures 1/4–1/2 inch body. Hacklemesh weavers (genus Callobius, family Amaurobiidae) are medium-sized spiders that build irregular, tangled mesh webs in rock crevices, under bark, in wood piles, and in other sheltered locations.
The Hacklemesh Weaver is generally low-risk, but caution is still advised. Not medically significant. Completely harmless.
In Arizona, hacklemesh weavers are most often encountered in the following situations: Irregular, tangled webs with distinctive bluish-white woolly silk in rock crevices or under bark. Medium brown spider in the web retreat. Found in higher elevation areas.
The Hacklemesh Weaver is most active during: Year-round in cooler mountain areas. 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 in most Arizona settings.
No treatment necessary.
If you spot a Hacklemesh Weaver 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 Hacklemesh Weaver?
Pest Control Bros LLC serves Maricopa, Chandler, Casa Grande, Tempe, Gilbert, and Mesa. No contracts. Free inspections. Same-week service.
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