Furrow spiders, scientifically known as Larinioides cornutus, are common arachnids that often prompt curiosity and concern due to their presence around human habitats. Many people encounter these spiders and wonder about their potential danger, especially given the general apprehension associated with spiders. Understanding their characteristics and habits can help alleviate fears and provide clear information.
Are Furrow Spiders Dangerous?
Furrow spiders, belonging to the orb-weaver family, are not dangerous to humans. Their venom is mild and primarily subdues insect prey. Bites from these spiders are rare and typically occur only in self-defense or when accidentally pressed against the skin.
If a bite occurs, the effects are usually minimal and localized. Symptoms typically include mild pain, numbness, swelling, itching, or redness at the bite site. Serious reactions are uncommon, and bites rarely require medical intervention.
Identifying Furrow Spiders
Identifying furrow spiders involves recognizing their distinct physical features and web patterns. They are medium-sized, with females typically measuring between 6 to 14 millimeters in body length and males slightly smaller, ranging from 5 to 9 millimeters. Their leg span can extend from 18 to 35 millimeters.
They often display colors from light brown to gray, sometimes reddish or olive tones. Their large, oval, and somewhat bulbous abdomen usually features a distinctive dark, zigzag-edged pattern resembling a furrow or wavy leaf. Their carapace, or head region, can be shiny and brown, reddish, or gray, often covered in fine hairs. Their legs are typically banded with small spines. As orb-weavers, they construct classic wheel-shaped webs, often found near water bodies or on human structures like eaves, porches, and windows.
Responding to a Furrow Spider Bite
While furrow spider bites are uncommon and generally harmless, knowing how to respond provides reassurance. If a bite occurs, gently clean the affected area with mild soap and water to prevent infection. Applying a cold compress or an ice pack to the bite site can help reduce swelling and discomfort.
Elevating the bitten limb, if applicable, can minimize swelling. Over-the-counter pain relievers can manage any mild pain, and antihistamines may be used to alleviate itching. Medical attention is not necessary unless unusual symptoms develop, such as signs of infection, increased pain or swelling, or if symptoms persist or worsen.