Carolina Wolf Spider

Hogna carolinensis — the Carolina wolf spider — is the LARGEST WOLF SPIDER in North America and one of the largest non-tarantula spiders that humans regularly encounter on the continent. The species is widespread across the eastern and central US (especially the southeastern US, where the species is most abundant). Females are 22-35 mm body length (the largest individuals exceed 35 mm), with leg span reaching 9-10 cm; males are slightly smaller (18-25 mm). The species is the OFFICIAL STATE SPIDER OF SOUTH CAROLINA — one of the few US states with an official state spider designation. Like all wolf spiders (family Lycosidae), the Carolina wolf spider is a GROUND-HUNTING SPIDER — it does not build webs to capture prey. Instead, the species pursues prey by sight and ambush from underground burrows. Carolina wolf spiders excavate vertical burrows 15-30 cm deep in well-drained soil (sandy areas, fields, woodland edges), with the burrow entrance often surrounded by a low silk-and-debris turret. The spider waits at the burrow entrance at night and ambushes passing arthropod prey (crickets, beetles, other large arthropods) by lunging from the burrow. Wolf spiders have excellent vision compared to most spiders — large forward-facing eyes provide good depth perception for prey capture and threat detection (the visual hunting biology is one of the species' most-cited features). The species is one of the most-photographed examples of MATERNAL CARE in spider biology. Female Carolina wolf spiders carry their EGG SACS — large round white silk balls containing hundreds of eggs — attached to the spinnerets at the rear of the abdomen, where the female can guard them and adjust the sac's exposure to sun for optimal embryonic development. After the eggs hatch, the dozens-to-hundreds of spiderlings CLIMB ONTO THE MOTHER'S BACK and ride there for 1-2 WEEKS until they have molted once and become large enough for independent life. The mother continues to hunt and forage with the spiderlings on her back; the spiderlings disperse after the first molt by ballooning (releasing strands of silk that catch the wind and carry the spiderling to new locations). The maternal-care behavior is one of the most-cited examples of arthropod parental investment and is featured in essentially every modern spider biology textbook. Despite the imposing size, Carolina wolf spiders are essentially harmless to humans — they will bite if forcibly handled, but the venom is medically insignificant (causes only mild local pain and swelling). The species is one of the most beneficial generalist predators in southeastern US grassland ecosystems and is a flagship species of NA spider biology.