These nocturnal hunting spiders are often encountered under wood, stones, and in other protected areas. They feed on a variety of different arthropods.
Spiderlings, like the one above, hatch throughout the spring and summer and attain roughly half their full size by late fall. They overwinter in protected sites, emerging as voracious juveniles who will molt into adults and then mate during the following summer and fall.
Males die shortly after mating. Fertilized females overwinter in protected locations, and produce egg sacs the following spring.
Females, often found carrying their spiderlings on their abdomen during the summer and early fall, may live for several years after reaching maturity.
One of my students brought in a fertilized female found in their house last December, who produced a nonviable egg sac in January.