Venomous Spiders in Michigan: Top 2 Species

By Bridget Ambrose

 Watch out, Michigan! Some creepy crawlers could be lurking around your home. 

While they may not be the most famous residents of the Great Lakes State, some spiders can cause quite a commotion. There aren’t many venomous spiders in Michigan, but you should remain vigilant about the dangerous pests you may see. 

Take a look at our blog to learn more!

Venomous Spiders in Michigan 

Enter the Northern Black Widow, with its glossy black body and crimson hourglass marking, and the reclusive Brown Recluse, boasting a mysterious violin-shaped pattern. 

Although encounters with these spiders are rare, staying informed about their presence, characteristics, and potential risks in Michigan’s wild corners is crucial.

Black Widow Spiders

Black widow spiders’ striking appearance and venomous bite have earned a fearsome reputation. While encounters with these creatures in Michigan are relatively rare, staying on your toes and watching for these pests is essential. 

Larger than her male counterparts, the female black widow spider measures about 0.5 to 1 inch (1.3 to 2.5 cm) in length. Her shiny black body showcases a vibrant red or orange hourglass-shaped marking on the underside of her abdomen, although the hourglass can sometimes be a bit misshapen or incomplete. 

Conversely, the males exhibit flashy appearances, featuring patterns of red, white, and yellow spots or bands on their backs.

These elusive spiders favor quiet spots, seeking solace in dark hideouts such as woodpiles, sheds, garages, and cluttered corners. Imagine their skillfully woven irregular webs nestled near the ground, waiting patiently for unsuspecting prey. 

Black widow spiders are far from social butterflies, opting for a solitary lifestyle and avoiding human contact. They usually only bite when they feel threatened or cornered, so there is no need to worry about them gatecrashing your picnic.

Now, let’s talk about their bite. The venom of a black widow spider packs a punch, armed with neurotoxins that target the nervous system. If you’re unlucky enough to experience a bite, you might not notice it, mistaking it for a mosquito nibble or tiny pinprick. 

But beware! Symptoms can escalate over time. You might find yourself dealing with intense pain at the bite site, muscle cramps that seem to have a life of their own, abdominal discomfort, nausea, profuse sweating, and other systemic effects.

While Michigan isn’t exactly crawling with black widow spiders, exercise caution when rummaging through dark, secluded areas, they might call home. If you suspect a black widow bite, don’t hesitate to seek medical attention promptly. 

Qualified healthcare professionals can provide the necessary treatment and management based on your symptoms.

Brown Recluse Spiders

Brown recluse spiders are light to medium brown in color and have a distinctive dark brown violin-shaped marking on their back. They have a leg span of about 1/4 to 1/2 inch (6 to 12 mm). Other spiders look similar to brown recluse spiders, so ensure you get a good look at any brown spiders you spot indoors. 

In Michigan, brown recluse spiders are not native, and their occurrences are infrequent. However, they can enter the state through shipping or travel. In the unlikely event of a brown recluse spider encounter, it’s essential to exercise caution.

Brown recluse spiders prefer dark, secluded areas, often found in basements, attics, closets, or other undisturbed spaces. They build irregular webs near the ground and avoid human contact unless handled or threatened.

A bite can cause localized tissue damage and systemic symptoms. Initially, it may go unnoticed or resemble a minor bug bite. It can become a necrotic lesion, forming a red, swollen, and painful sore. Systemic symptoms include fever, headache, nausea, and muscle pain.

Brown recluse spider bites are rare in Michigan. If you suspect a brown recluse spider has bitten you, it is crucial to seek medical attention promptly. Healthcare professionals can evaluate the bite, provide appropriate treatment, and manage potential complications.

To minimize the chances of encountering brown recluse spiders or other spiders, sealing cracks and crevices and using screens on doors and windows can help prevent their entry.

Remember, while brown recluse spiders aren’t common venomous spiders in Michigan, stay informed and take precautions around unfamiliar pests. 

Are There Other Venomous Spiders in Michigan?

Apart from the northern black widow and the brown recluse spiders, no other spiders are of significant concern in Michigan. 

Some common spiders you might encounter include garden spiders, orb weavers, wolf spiders, jumping spiders, and funnel weavers. These spiders are generally harmless to humans and pose no significant threat.

While all spiders can bite, they typically only do so when intimidated or provoked. In most cases, spider bites result in minor symptoms such as local swelling, redness, and itchiness, similar to a mosquito bite. Severe or allergic reactions to spider bites are infrequent.

If you encounter spiders in your home or surroundings and are concerned about their presence, it’s best to contact local pest control professionals for proper identification and guidance. 

At proof. Pest Control, we’re here to tackle your spider problems in Michigan head-on. Our experienced technicians begin with a thorough inspection to identify the spider species and assess the extent of the infestation. 

Don’t let spiders weave their worries— let proof. Pest Control handle the venomous spiders in Michigan!

Call proof. pest control at 888-291-5333, or send us a message online.

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