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Hackled Orb Weaver (Uloborus diversus)

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description Hackled Orb Weaver (Uloborus diversus) Overview

Uloborus diversus, commonly known as the hackled orb weaver, is a species of small spider native to North America. It belongs to the family Uloboridae, which is biologically distinct because its members completely lack venom glands. Instead of relying on venom, these spiders immobilize their prey by rapidly wrapping them in dense layers of cribellate silk. They construct characteristic orb webs that often include a distinctive stabilimentum.

help Hackled Orb Weaver (Uloborus diversus) FAQ

Is the hackled orb weaver Uloborus diversus venomous?

Uloborus diversus belongs to Uloboridae, the spider family known for lacking venom glands. It captures prey with specialized cribellate silk rather than injecting venom.

What kind of web does Uloborus diversus build?

Hackled orb weavers build orb webs made with fuzzy cribellate silk. Records for this group describe webs that are often horizontal rather than the classic vertical orb webs of many other orb weavers.

Where can Uloborus diversus be found?

It is a North American species, with documented field records in California. Its small size and web structure can make it easy to overlook among vegetation.

How does Uloborus diversus catch insects without venom?

The spider’s hackled silk mechanically entangles insect legs and body rather than using adhesive venom delivery. Once prey is trapped, the spider immobilizes it with silk and biting.

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