Bug Identifier
Yellow Sac Spider
Community identification

Yellow Sac Spider

Cheiracanthium mildei

Order & Family
Araneae: Cheiracanthiidae
Size
5 to 10 mm (body length), with legs extending significantly further.
See this bug in the Encyclopedia

Natural Habitat

Gardens, low foliage, and frequently inside homes along walls, ceilings, and window frames.

Diet & Feeding

Carnivorous; feeds on a variety of small insects and even other spiders.

Behavior Patterns

Active nocturnal hunters that do not build webs to catch prey. Instead, they build silky tube-like retreats (sacs) in protected areas to rest during the day.

Risks & Benefits

Benefits the ecosystem by controlling pest populations. While their bite can be painful and cause localized swelling or itching similar to a bee sting, they are generally not considered medically significant to healthy humans.