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Yellow Sac Spiders

Yellow Sac Spider

Sac Spiders are about 1/4to 3/8th inch long with no conspicuous markings. The front legs are longer than the other three pairs and the coloring ranges from pale green, light brown to tan. They will usually have darker mouth parts. The Sac Spider gets its name from its trait of constructing a silken tube like “sac” in a protected area and using it as a resting or “perching”. These sacs can be located under a leaf, logs, or in corners like where a wall meets a ceiling. At night, sac spiders actively hunt insects for prey. Indoors, they can be found on walls and ceilings, and will usually drop to the floor to seek cover when disturbed.

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