Are There Centipedes in Maryland?

Are They in Maryland?

The large dangerous centipedes, such as Scolopendra, are not established in Maryland. The state's climate and habitat do not support permanent populations of medically significant species. Small centipedes, typically less than two inches long, are common throughout Maryland. These harmless species live in soil, under logs, leaf litter, and in damp areas throughout the state. They prefer moist environments where they can hunt small invertebrates. The dangerous species you might read about are found in more southern and southwestern states, primarily Texas, Oklahoma, Arizona, and parts of the Gulf Coast. Maryland's geography and climate are simply not suitable for these tropical and subtropical centipedes. Learn more aboutCentipede in Marylandto understand the species actually present in the state. If you have found a centipede in Maryland, it is definitely one of the small, native species. These creatures play an important role in Maryland's soil ecosystem by preying on pests.

How Dangerous Is It?

Maryland's native centipedes are not dangerous to humans. Their fangs cannot penetrate human skin, and they do not inject venom. These small centipedes are extremely shy and will flee from humans rather than confront them. They are more likely to run away than to bite, even if you pick them up accidentally. They have no reason to attack people and instead spend their time hunting soil invertebrates, worms, and other pests. There are no medical records of injuries from Maryland centipedes because these creatures simply cannot harm people. The presence of centipedes on your property is actually a good sign. They indicate that your yard or garden has a healthy ecosystem. By eating pest insects and other invertebrates, centipedes help keep your outdoor space in balance. They are part of the food web, preyed upon by spiders, beetles, lizards, and birds. Understanding that Maryland centipedes are completely harmless allows you to appreciate their role in nature.

How to Recognize One

Maryland centipedes are small and distinctive. They have long, flattened bodies with one pair of legs attached to each body segment. This distinguishes them from millipedes, which have two pairs of legs per segment. You can identify Maryland centipedes by their color, typically brown, reddish-brown, or dark brown. Most are under two inches long, with the largest rarely exceeding three inches. They have long, thread-like antennae and move quickly when disturbed. SeeMaryland wildlifefor more details about identifying creatures in your area. You will most commonly find centipedes when turning over rocks, logs, or boards that have been sitting on moist ground. They hide under bark, in rotting wood, among leaf litter, and in soil. Centipedes cannot survive in dry conditions because their skin easily loses moisture. They are nocturnal, active mainly at night or on overcast, humid days. During the day, they hide in protected places deep in the soil or under objects. Spring and fall are the seasons when you are most likely to encounter them when soil moisture is highest.

What to Do If You Are Bitten or Stung

Maryland's small centipedes cannot bite through human skin. If you somehow accidentally injure yourself while handling one, which is extremely unlikely, simply wash the area with soap and water. No medical attention is necessary because no venom enters your body. The small fangs of Maryland centipedes are too weak to break human skin. The best approach is to avoid handling centipedes altogether. Leave them to their important work of controlling pests in the soil. If you find one in your house, capture it gently in a cup and release it outside. This is general information, not medical advice; if you are bitten, call Poison Control at 1-800-222-1222, or 911 if symptoms are severe. For Maryland residents, this number connects you to the National Capital Poison Center. The reality is that centipede-related injuries in Maryland are nonexistent because the state has no dangerous species. Wildlife should always be handled with care and respect, but centipedes in Maryland present no realistic health risks whatsoever.

How to Prevent Encounters

Preventing centipede encounters in Maryland requires simple steps focused on moisture control. Keep your home dry and well-sealed. Centipedes are attracted to moisture, so fix leaky pipes and use a dehumidifier in basements. Seal cracks around doors, windows, and foundation walls. Remove piles of wood, leaves, and mulch from immediately next to your house. These piles are ideal centipede habitats. Keep grass cut short and create distance between garden beds and your foundation. For more practical wildlife safety information, consultour wildlife guides. Indoors, vacuum regularly and keep areas clean and dry. Store firewood away from the house. Shake out bedding before bed, though finding a centipede in your bed is exceptionally rare. When gardening or hiking in Maryland, wear closed-toe shoes. Check your clothing after being outdoors, particularly in wooded areas or near water. Do not panic if you encounter one. Stay calm, allow it to pass, and remember that centipedes are far more afraid of you than you need to be of them. Recognizing that Maryland centipedes are beneficial helps reduce unnecessary worry.

Where in Maryland and When

Small centipedes are found throughout Maryland in suitable habitats. They are particularly common in the state's forested areas, especially in regions with dense leaf cover and decaying wood. Western Maryland's mountains, the Piedmont region, and the Coastal Plain all support centipede populations. Explorewildlife in Marylandto learn about these creatures in various habitats across the state. Centipedes are active from spring through fall, with peak activity in May, June, September, and October when soil moisture is high. Summer droughts and winter freezing both reduce their surface activity. They cannot survive harsh winters in exposed areas, so they retreat deep underground. Spring brings them back to the soil surface as temperatures warm. If you live near forests, streams, or have a moist garden, you will have a higher chance of seeing centipedes during warm, humid weather. Maryland's rivers, including the Potomac and Susquehanna, support centipede populations in their riparian zones. Tidewater areas and swamps are also rich in centipede species. Understanding their seasonal and geographic patterns helps you know when and where you might encounter them during outdoor activities.

Harmless Lookalikes

The most common confusion is between centipedes and millipedes, both found in Maryland soil. Millipedes are completely harmless and even shier than centipedes. The key difference is that centipedes have one pair of legs per body segment and run quickly, while millipedes have two pairs of legs per segment and move slowly. Millipedes curl into a tight ball when threatened, while centipedes run away. Millipedes are typically brown or black and have a round cross-section. Another lookalike is the symphylan, a small soil-dwelling arthropod rarely noticed by most people. Symphylans are tiny, pale, and even more fragile than small centipedes. They occupy the same soil environments as centipedes. Learnmore on Centipede in Marylandto distinguish between these species. If you find a small arthropod with many legs in Maryland soil or leaf litter, it is almost certainly harmless. Maryland has no dangerous centipedes, no dangerous millipedes, and no lookalike species that pose threats to people. Every small arthropod you might find is benefiting your garden and property by controlling pests. Learning to identify these creatures reduces unnecessary fear and helps you appreciate their ecological value.

Frequently Asked Questions

Are centipedes deadly? No. Maryland's centipedes are not deadly and cannot harm humans. The large dangerous species that can deliver painful bites are not found in the state.

How common are centipede bites in Maryland? Centipede bites are virtually nonexistent in Maryland. There are no medical records of injuries from the state's native centipede species because they cannot bite humans.

What attracts centipedes to a house? Moisture attracts centipedes indoors. They seek humid basements, damp crawl spaces, and areas with high moisture. Fixing plumbing leaks and improving ventilation makes homes less attractive.

What should I do if I see one? Stay calm and allow it to pass. If indoors, gently capture it in a cup and release it outside. ConsultMaryland wildlife guideto learn about safely encountering wildlife. Centipedes are harmless, shy creatures that want nothing to do with people. Understanding their behavior helps you coexist peacefully with Maryland's native wildlife.