Steatoda borealis

The spider species Steatoda borealis belongs to the genus Steatoda, in the family Theridiidae. Steatoda borealis spiders have been sighted 72 times by contributing members. Based on collected data, the geographic range for Steatoda borealis includes 2 countries and 19 states in the United States. Steatoda borealis is most often sighted indoors, and during the month of May.

Taxonomic Hierarchy

Kingdom: Animalia
Phylum: Arthropoda
Class: Arachnida
Order: Araneae
Suborder: Araneomorphae
Family: Theridiidae
Genus: Steatoda
Species: Steatoda borealis

Author

Nicholas Marcellus Hentz, 1850

Primary Colors

Sightings Overview

There have been 72 confirmed sightings of Steatoda borealis, with the most recent sighting submitted on August 1, 2025 by Spider ID member sharpfrankiev. The detailed statistics below may not utilize the complete dataset of 72 sightings because of certain Steatoda borealis sightings reporting incomplete data.

Web: 38% of the time, Steatoda borealis spiders are sighted in a spider web (Sample size: 72)
Sex: 6 female and 26 male.
Environment: Steatoda borealis has been sighted 18 times outdoors, and 54 times indoors.
Outdoors: Man-made structure (14). High foliage (1). Ground layer (1). Under rock or debris (1). Forest (1).

Location and Range

Steatoda borealis has been sighted in the following countries: Canada, United States.

Steatoda borealis has also been sighted in the following states: Alaska, Connecticut, Delaware, Illinois, Indiana, Iowa, Maine, Maryland, Massachusetts, Michigan, Minnesota, Nebraska, New Hampshire, New Jersey, New York, Pennsylvania, Rhode Island, Tennessee, Wisconsin.