Exploring the Snakes of Pennsylvania: A Guide to Local Species
Pennsylvania is home to a variety of snake species, each playing a unique role in the ecosystem. From the venomous Eastern Timber Rattlesnake to the harmless Eastern Garter Snake, these reptiles are fascinating creatures with distinct characteristics. Here’s a comprehensive guide to the different types of snakes you might encounter in Pennsylvania.
Eastern Timber Rattlesnake (Crotalus horridus)
The Eastern Timber Rattlesnake varies in color from yellowish-brown to gray and features dark V-shaped crossbands. It typically grows to a length of 3-5 feet and has a distinctive rattle on its tail used as a warning signal. Preferring deciduous forests, rocky hillsides, and mountainous areas, this snake is shy and reclusive, generally avoiding human contact. It is active from late April to October, primarily during warm months, and is listed as a species of special concern due to habitat loss and persecution.
Northern Copperhead (Agkistrodon contortrix mokasen)
The Northern Copperhead has a coppery-red head with hourglass-shaped crossbands on a lighter body, typically measuring 2-3 feet long. Its crossbands often resemble Hershey’s Kisses. Found in mixed woodlands, rocky outcrops, and near streams and rivers, this nocturnal snake is especially active during the summer months. It is non-aggressive but will bite if threatened and gives birth to live young, usually in late summer or early fall.
Eastern Massasauga (Sistrurus catenatus)
The Eastern Massasauga is light gray or brown with dark blotches along its back and is the smallest venomous snake in Pennsylvania, typically 18-30 inches long. It has a small, segmented rattle that is often hard to hear. Preferring wetland areas such as marshes, bogs, and low-lying fields, this rare and secretive snake is often difficult to spot. It is listed as a threatened species and protected by law. The name “Massasauga” is derived from the Chippewa word for “great river mouth.”
Eastern Garter Snake (Thamnophis sirtalis)
The Eastern Garter Snake is typically greenish or brownish with three yellow or white stripes running along its body and usually measures 2-4 feet long. Found in a variety of habitats, including gardens, woodlands, and wetlands, this snake is active during the day, often seen basking in the sun or swimming in water. Harmless to humans, it is beneficial for controlling pests and is known for its agility, moving quickly through grass and water.
Eastern Milk Snake (Lampropeltis triangulum)
The Eastern Milk Snake is brown or gray with reddish-brown blotches bordered in black, resembling the pattern of a milk cow, and typically measures 2-4 feet long. Preferring woodlands, rocky outcrops, and barns, where it preys on rodents, this non-venomous and shy snake is often mistaken for a venomous rattlesnake due to its coloration. Milk snakes are constrictors, meaning they kill their prey by wrapping around it and squeezing until it suffocates.
Black Rat Snake (Pantherophis alleghaniensis)
The Black Rat Snake is solid black with a white or yellow throat and can reach lengths of 4-6 feet. Common in forests, farmlands, and rocky outcrops, this snake is often found near barns and buildings. Known for their impressive size and strength, black rat snakes are excellent climbers, often seen scaling trees in search of prey. Harmless to humans, they constrict and suffocate their prey, including birds and small mammals.
Black Racer Snake (Coluber constrictor constrictor)
The Northern Black Racer is a non-venomous snake found in the eastern United States, including Pennsylvania. It can grow up to 6 feet long and is known for its smooth, shiny black body and lighter belly. This snake likes to live in forests, fields, and wetlands and is very fast and active during the day. It hunts small animals like mice, birds, frogs, and insects. While it helps control pests, people often mistake it for a dangerous snake. Even though it can act defensively when scared, it is not harmful to humans.
How to Stay Safe Around Snakes
While most snakes in Pennsylvania are harmless and beneficial, it’s essential to take precautions to avoid bites. Stay on trails and avoid wandering into tall grass or wooded areas where snakes may be hiding. Wearing long pants and boots can help protect against snake bites, and if you encounter a snake, maintain a safe distance and do not attempt to handle it.
Call a Professional
Understanding the snakes of Pennsylvania not only enhances our appreciation of these creatures but also helps us coexist with them safely. Whether you’re hiking through the woods or gardening in your backyard, knowing what to look for can make all the difference.
If you encounter a snake inside your home or need assistance with wildlife removal, contact a professional wildlife control service. We can safely and humanely relocate snakes without harming them or posing a risk to you and your family. For any wildlife concerns or assistance, feel free to reach out to us!