Orb weaver spiders, known for their intricate, circular webs, are a common sight in gardens and natural areas worldwide. Many people wonder if these spiders pose a threat, particularly regarding their bite. While orb weavers can bite, such incidents are quite rare and typically occur only under specific circumstances. These spiders are generally docile, focusing on web construction and maintenance for capturing insects, and are more inclined to flee from perceived threats than to confront them.
Why Orb Weavers Bite
Orb weaver bites are primarily defensive, occurring when the spider feels threatened, trapped, or is accidentally pressed against human skin. Common scenarios for a bite include inadvertently reaching into an area where a web is present, or accidentally disturbing a spider that has dropped onto clothing.
The spider’s natural inclination when disturbed is often to escape by running away or dropping from its web and playing dead. Biting is a last resort, employed only when the spider perceives no other option for evasion. Their venom is designed to paralyze small insect prey, not to inflict serious harm on larger animals or humans.
What Happens After an Orb Weaver Bite
An orb weaver bite is typically mild and does not cause severe medical issues for humans. The sensation is often compared to a bee or wasp sting, resulting in localized pain, redness, and mild swelling at the bite site. Some individuals may also experience numbness or mild itching. These symptoms typically resolve on their own within a few hours to a couple of days.
For first aid, thoroughly clean the bite area with soap and water to prevent infection. Applying a cold compress or ice pack can help reduce pain and swelling. Over-the-counter pain relievers or antihistamines may be used to manage discomfort or itching if needed. Medical attention is generally not required unless symptoms worsen significantly. Seek medical help if signs of infection develop (e.g., increasing redness, warmth, pus, worsening pain), or if a rare allergic reaction occurs (e.g., nausea, dizziness).
Recognizing Orb Weavers
Identifying orb weavers helps, as these spiders are typically harmless to humans. Their most distinctive feature is the large, circular, wheel-shaped web they construct, often found in gardens, between structures, or among plants. These intricate webs can reach up to three feet in diameter and are frequently rebuilt nightly.
Orb weavers themselves vary widely in appearance across the numerous species, but many have rounded, often bulbous abdomens. Colors and patterns can range from reddish-brown or gray to bright yellows and oranges, sometimes with leaf-shaped patterns or spines. They commonly position themselves head-down in the center of their web, waiting for prey, or hide nearby with a signal line to detect vibrations.