Bug Identifier
Common House Spider
Community identification

Common House Spider

Parasteatoda tepidariorum

Order & Family
Araneae: Theridiidae
Size
Females range from 5 to 6 mm in body length; males are smaller, ranging from 3.8 to 4.7 mm.
See this bug in the Encyclopedia

Natural Habitat

Widely distributed globally, typically found in man-made structures such as sheds, barns, basements, and under eaves.

Diet & Feeding

Carnivorous insectivores that feed on flies, mosquitoes, ants, wasps, and other spiders that crawl into their tangled webs.

Behavior Patterns

Builds tangled, messy-looking cobwebs. They are non-aggressive, usually retreating to a corner of the web when disturbed. Females produce distinctive pear-shaped, brownish egg sacs.

Risks & Benefits

Benefits the ecosystem and homeowners by controlling pest insect populations. Their bite is not dangerous to humans, typically resulting in only minor redness or swelling similar to a bee sting if they are handled roughly.