Yellow Sac Spider

Natural Habitat

Found indoors in corners of walls and ceilings, or outdoors in gardens, foliage, and under bark.

Diet & Feeding

Secondary consumer; hunts small insects and other spiders actively at night.

Behavior Patterns

Nocturnal hunter that does not build a web for catching prey. Instead, it builds small, silk, tube-like 'sacs' for resting during the day.

Risks & Benefits

Benefits include pest control by eating flies and moths. Risks include a mildly painful bite that can cause redness or swelling, though it is not considered medically significant for most humans.

Identified on: 6/13/2026