Tarantulas are large, often hairy spiders found in diverse habitats worldwide, from tropical forests to deserts. Many people wonder if these creatures bite. Yes, tarantulas can bite, and this article clarifies when and why, the effects, and other defensive behaviors they employ.
Understanding Tarantula Bites
Tarantulas can bite, but this is primarily a defensive action, not aggression towards humans. Bites are rare, as these spiders prefer to avoid confrontation.
A tarantula typically bites when threatened, startled, or mishandled. Before biting, it may display a “threat posture,” raising its front legs and exposing its fangs as a warning. Ignoring these signals or cornering the spider increases the likelihood of a bite. Tarantulas are timid creatures that usually try to escape first.
Effects and Care After a Bite
If a tarantula bite occurs, the experience is often comparable to a bee sting. Symptoms at the bite site include localized pain, redness, and swelling. The venom of most tarantula species is mildly toxic to humans and rarely causes severe reactions. Some species, however, may have more potent venom, potentially leading to muscle cramping or more intense pain.
For basic first aid, wash the bite area thoroughly with soap and water to minimize infection risk. Applying a cool compress or ice pack can help reduce swelling and numb the pain. Over-the-counter pain relievers can manage discomfort. Seek medical attention if symptoms worsen, spread, or include signs of an allergic reaction such as difficulty breathing, hives, swelling of the lips or throat, or low blood pressure.
Tarantula Defenses Beyond Biting
Beyond biting, many tarantulas employ urticating hairs as a primary defense. These tiny, barbed bristles are located on the tarantula’s abdomen. When threatened, the spider flicks these hairs into the air using its hind legs, creating a cloud directed at a perceived threat.
Upon contact, urticating hairs can embed in the skin or mucous membranes, causing itching, irritation, and a rash. The discomfort can range from mild to severe, sometimes lasting for weeks. If these hairs enter the eyes, they can cause significant irritation, pain, and serious issues requiring medical attention.
Tarantulas also use these hairs to line their burrows or egg sacs, providing a passive defense. Other defensive behaviors include rearing up to appear larger or simply fleeing from danger.