Philodromidae
(Running Crab Spiders)

The spider family Philodromidae, commonly known as Running Crab Spiders, have been sighted 167 times by contributing members. Based on collected data, the geographic range for Philodromidae includes 2 countries and 38 states in the United States. Philodromidae is most often sighted indoors, and during the month of April.

Taxonomic Hierarchy

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

Common Name (AAS)

Running Crab Spiders

Other Common Names

Crab Spiders

Author

Tamerlan Thorell, 1870

Sightings Overview

There have been 167 confirmed sightings of Philodromidae (Running Crab Spiders), with the most recent sighting submitted on June 26, 2025 by Spider ID member thulhu. The detailed statistics below may not utilize the complete dataset of 167 sightings because of certain Philodromidae sightings reporting incomplete data.

Web: 7% of the time, Philodromidae spiders are sighted in a spider web (Sample size: 167)
Sex: 4 female and 30 male.
Environment: Philodromidae has been sighted 92 times outdoors, and 96 times indoors.
Outdoors: Man-made structure (51). On flower (1). Low foliage (15). High foliage (4). Ground layer (5). Under rock or debris (1). Freshwater river, lake, stream (1). Saltwater (1). Open field, pasture, grassland (7). Forest (6).

Location and Range

Philodromidae (Running Crab Spiders) has been sighted in the following countries: Canada, United States.

Philodromidae has also been sighted in the following states: Alabama, Alaska, Arizona, California, Colorado, Connecticut, Florida, Georgia, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Montana, Nebraska, Nevada, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Oregon, Pennsylvania, Rhode Island, Tennessee, Texas, Utah, Washington, Washington, D.C., Wisconsin, Wyoming.