Broad-faced Sac Spider
Scientific Name: Trachelas tranquillus
Order & Family: Araneae, Corinnidae
Size: Females 7-10 mm; Males 5-8 mm

Natural Habitat
Typically found outdoors in gardens, under rocks, leaf litter, and bark. Can also be found indoors, especially in basements and ground-level rooms.
Diet & Feeding
Primarily preys on smaller insects and other arthropods. They are active hunters rather than web-builders for prey capture.
Behavior Patterns
Nocturnal hunters. They do not build typical webs for catching prey, but rather construct silken sacs or retreats in sheltered locations during the day. They are known for their fast movements.
Risks & Benefits
Generally considered harmless to humans, though their bite can be mildly painful, similar to a bee sting, resulting in localized swelling or redness. They are beneficial as they prey on various pest insects.
Identified on: 9/17/2025