Yellow Sac Spider

Natural Habitat

Typically found in gardens, trees, and shrubs; frequently moves indoors to walls and ceilings in fall.

Diet & Feeding

Carnivorous; hunts small insects and other spiders, sometimes consumption of nectar.

Behavior Patterns

Nocturnal active hunters that do not spin webs for catching prey, but build silk 'sacs' for resting and protection during the day.

Risks & Benefits

Benefits the ecosystem by controlling pest populations. May bite if provoked or trapped against skin; the bite is painful and can cause localized swelling but is not generally medically significant.

Identified on: 6/12/2026