Yellow Sac Spider
Scientific Name: Cheiracanthium mildei
Order & Family: Araneae, Cheiracanthiidae
Size: 5 to 10 mm in body length
Natural Habitat
Gardens, shrubs, and frequently found inside residential homes near ceilings and corners.
Diet & Feeding
Carnivorous; hunts small insects and other spiders actively at night.
Behavior Patterns
Nocturnal hunters that do not build webs to catch prey; instead, they build silk retreats (sac-like structures) for resting during the day.
Risks & Benefits
Benefits the ecosystem by controlling pest populations. Biting is rare but can cause localized pain, swelling, and itching similar to a bee sting.
Identified on: 12/27/2025