Yellow Sac Spider

Natural Habitat

Indoors on walls and ceilings, or outdoors in gardens and leaf litter.

Diet & Feeding

Carnivorous, primarily eating small insects and other spiders.

Behavior Patterns

Nocturnal hunters that do not build webs for prey; they create small silk 'sacs' for resting and overwintering.

Risks & Benefits

Provides pest control by eating insects. Their bite can be painful and cause localized swelling or itching, but is generally not medically significant for most people.

Identified on: 1/13/2026