Broad-faced Sac Spider

Scientific Name: Trachelas tranquillus

Order & Family: Araneae, Corinnidae

Size: Females typically 6-10 mm; males 5-7 mm (body length).

Broad-faced Sac Spider

Natural Habitat

Found in various habitats, including indoors in homes, under bark, rocks, and leaf litter. Often found in gardens and natural areas.

Diet & Feeding

Predatory, feeding on a wide variety of small insects and other arthropods.

Behavior Patterns

Nocturnal hunters, actively seeking prey rather than building webs for capture. They create silken sacs or retreats under bark, rocks, or in crevices to rest during the day or to lay eggs.

Risks & Benefits

Generally considered harmless to humans. While they can bite if provoked or threatened, their venom is not considered medically significant, causing only mild, localized pain and irritation similar to a bee sting. They are beneficial for pest control as they prey on various insects.

Identified on: 10/6/2025