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Have a Spiny-Backed Orb Weaver Spider Problem?

Description

The Spiny-backed Orb Weaver Spider is a very small, brightly colored garden spider that spins an orb shaped web. This colorful spider has a body of yellow, white or orange, with red spines that point outward. Males are about 1/8” long while females are larger at 3/8″. In some regions it is also called a “crab spider”.

The female Spiny-backed Orb Weaver Spider spins a new web each night in a plant or on a building, often where flying and crawling insects are attracted to a light. A male will wait nearby. They are not aggressive toward humans and only deliver a harmless bite if held.

The Spiny-backed Orb Weaver Spider has a short lifespan. The male dies soon after mating and the female dies soon after producing her egg sac.

Color

Black and yellow

Size

1/16”-3/8”

Spiny-Backed-Orb-Weaver-Spider

The spineybacked orb weaver spider, also known as the crab-like orbweaver and the spiny orbweaver, get their common name from the spines that protrude from their abdomen and their body shape that generally looks like that of a crab. They are a very colorful, easily recognized spider. Their abdomen is white and contains black spots with large red spines extending from the edge of the abdomen. Their legs and cephalothorax are black. Throughout its area of distribution, there can be some specimens with a yellowish abdomen instead of white, and their spines may be black instead of red.

Control Advice

If found inside, relocate the spider outdoors if possible. Limit vegetation near the house to reduce spider activity close to the home. Use yellow ‘bug’ lights for overnight lighting.

Active Seasons

The Spiny-backed Orb Weaver Spider is most active in spring, summer and fall.

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