Broad-faced Sac Spider

Scientific Name: Trachelas tranquillus

Order & Family: Araneae, Corinnidae

Size: 3-10 mm (body length)

Broad-faced Sac Spider

Natural Habitat

Found in various natural settings like forests, gardens, and under bark or stones. They often wander into human structures, especially at night, seeking prey or shelter.

Diet & Feeding

Predatory, feeding on a wide range of small insects and other arthropods that they actively hunt.

Behavior Patterns

Nocturnal hunters that do not build webs for catching prey, but rather use silk to construct a retreat or 'sac' where they rest during the day or lay eggs. They are quite fast-moving.

Risks & Benefits

Generally considered harmless to humans. While they can bite if provoked, their venom is not medically significant and usually results in only minor localized pain and redness. They can be beneficial by controlling pest insect populations.

Identified on: 9/20/2025