Theridiidae
(Cobweb Weavers)

Taxonomic Hierarchy

• Kingdom: Animalia
• Phylum: Arthropoda
• Class: Arachnida
• Order: Araneae
• Suborder: Araneomorphae
• Family: Theridiidae

Common Name (AAS)

Cobweb Weavers

Other Common Names

Cobweb Spiders, Cob Web Spiders, Comb-footed Spiders, Tangle-web Spiders, Gumfoot-web Spiders

Author

Carl Jakob Sundevall, 1833

Sightings Overview

There have been 1033 confirmed sightings of Theridiidae (Cobweb Weavers), with the most recent sighting submitted on November 17, 2025 by Spider ID member jobrien110. The detailed statistics below may not utilize the complete dataset of 1033 sightings because of certain Theridiidae sightings reporting incomplete data.

• Web: 38% of the time, Theridiidae spiders are sighted in a spider web (Sample size: 1033)
• Sex: 100 female and 166 male.
• Environment: Theridiidae has been sighted 413 times outdoors, and 673 times indoors.
• Outdoors: Man-made structure (278). On flower (1). Low foliage (32). High foliage (13). Ground layer (40). Under rock or debris (29). Freshwater river, lake, stream (2). Open field, pasture, grassland (6). Forest (5). Cave (1). Desert area (6).

Location and Range

Theridiidae (Cobweb Weavers) has been sighted in the following countries: Canada, United States.

Theridiidae has also been sighted in the following states: Alabama, Alaska, Arizona, Arkansas, California, Colorado, Connecticut, Delaware, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Iowa, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Missouri, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Rhode Island, South Carolina, South Dakota, Tennessee, Texas, Utah, Virginia, Washington, West Virginia, Wisconsin, Wyoming.

Seasonality

Theridiidae has been primarily sighted during the month of May.

• January: 68
• February: 85
• March: 139
• April: 182
• May: 214
• June: 66
• July: 44
• August: 34
• September: 36
• October: 83
• November: 35
• December: 47