Venomous Snake Species in Connecticut: Staying Safe in The Constitution State

Connecticut venomous snakes

Connecticut, despite being a small state in the northeastern region of the United States, is home to a diverse array of wildlife. Among its inhabitants are several species of snakes, including two venomous species—the Timber Rattlesnake (Crotalus horridus) and the Copperhead (Agkistrodon contortrix).

While encounters with these venomous snakes are relatively rare, understanding their characteristics and habitats can help residents and visitors appreciate Connecticut’s natural biodiversity while ensuring their safety. In this article, we will explore the characteristics, distribution, and conservation efforts surrounding venomous snakes in Connecticut.

1. Timber Rattlesnake (Crotalus horridus)

Eastern Timber Rattlesnake
Source: newsweek.com

The Timber Rattlesnake, also known as the Eastern Diamondback Rattlesnake, is the only venomous snake species listed as endangered in Connecticut. Here are some key features of this remarkable serpent:

  • Appearance: Adults can grow up to 4 to 5 feet in length, with a thick body and distinctive dark brown or black diamond-shaped markings along their yellowish-brown or grayish background.
  • Range and Habitat: Timber Rattlesnakes are found in the central and eastern parts of the state, primarily inhabiting rocky woodlands, hillsides, and ledges.
  • Behavior and Diet: These snakes are generally shy and reclusive, preferring to avoid human encounters. They are known for their distinctive rattling sound, produced by the segments at the tip of their tails. They feed on small mammals, such as mice and chipmunks.
  • Conservation: Due to habitat loss and human persecution, Timber Rattlesnake populations have significantly declined in Connecticut. Various conservation efforts are underway, including habitat preservation, public education, and research to ensure the survival of this unique species.

2. Copperhead (Agkistrodon contortrix)

Northern Copperhead, Agkistrodon contortrix, Controlled situation, Face details, PA, USA.
Source: livescience.com

The Copperhead is a venomous snake species found throughout the eastern United States, including parts of Connecticut. Here’s what you should know about this venomous snake:

  • Appearance: Copperheads have a distinct copper-colored head and reddish-brown or tan bodies, with hourglass-shaped crossbands that darken as they age. They are relatively smaller than Timber Rattlesnakes, typically ranging from 2 to 3 feet in length.
  • Range and Habitat: Copperheads can be found in the southern and western regions of Connecticut. They prefer a variety of habitats, including forests, rocky areas, and swamps.
  • Behavior and Diet: These snakes are mostly nocturnal and prefer to avoid confrontation. They feed on small mammals, amphibians, and insects.
  • Conservation: While Copperheads are not considered endangered or threatened in Connecticut, habitat loss and human activities continue to impact their populations. Conservation efforts focus on preserving their habitats and raising awareness about snake conservation among residents.

Safety and Precautions

Although venomous snake encounters are rare in Connecticut, it is essential to take precautions when exploring natural areas:

  1. Stay on designated trails and avoid tall grass or dense underbrush.
  2. Wear appropriate footwear, such as closed-toe shoes or boots, when venturing into snake habitats.
  3. Be aware of your surroundings and avoid placing your hands or feet in areas where snakes could be hiding, such as rock crevices or fallen logs.
  4. If you encounter a snake, maintain a safe distance and give it space to retreat. Do not attempt to handle or provoke the snake.
  5. In the event of a snakebite, seek immediate medical attention and try to identify the snake if possible to assist with medical treatment.

Common Non-Venomous Snakes in Connecticut

Connecticut is home to several non-venomous snake species, which are more commonly encountered than their venomous counterparts. Here are some of the most common non-venomous snakes found in Connecticut:

1. Eastern Garter Snake (Thamnophis sirtalis)

Source: britannica.com

The Eastern Garter Snake is one of the most widespread and abundant snake species in Connecticut. They have a slender body with three longitudinal stripes running along their length, typically greenish or brownish in color.

Garter snakes are often found near water sources, such as wetlands, ponds, and streams. They primarily feed on small amphibians, fish, and invertebrates.

2. Eastern Ribbon Snake (Thamnophis sauritus)

Eastern Ribbon Snake (Thamnophis sauritus)
Source: herpsofnc.org

The Eastern Ribbon Snake closely resembles the Eastern Garter Snake but can be distinguished by its longer, narrower body and a more prominent light-colored stripe running along its side.

They inhabit similar habitats as garter snakes, favoring wetlands and areas with ample vegetation. Their diet consists mainly of small frogs, tadpoles, and aquatic invertebrates.

3. Northern Water Snake (Nerodia sipedon)

img source: herpsofnc.org

The Northern Water Snake is a robust species commonly found near bodies of water, including rivers, ponds, and marshes. They have a dark brown or black coloration with distinctive reddish-brown or grayish-brown crossbands.

Despite their name, they are not venomous and are primarily active during the day. Northern Water Snakes feed on fish, amphibians, and small mammals.

4. Brown Snake (Storeria dekayi)

img source: sdherps.org

Brown Snakes are small, slender snakes typically ranging from 9 to 13 inches in length. They have a brown or grayish coloration with a pale stripe running down the middle of their back.

These snakes can be found in a variety of habitats, including woodlands, meadows, and gardens. They primarily feed on earthworms, slugs, and other small invertebrates.

5. Eastern Milk Snake (Lampropeltis triangulum)

The Eastern Milk Snake is a non-venomous species known for its vibrant coloration and pattern, which can vary greatly between individuals.

They have a reddish-brown or grayish background with bold, dark brown or reddish-brown blotches along their body. Milk snakes are often found in forested areas, rocky hillsides, and farmlands. They feed on small rodents, lizards, and birds’ eggs.


Connecticut’s venomous snakes, the Timber Rattlesnake and Copperhead are fascinating and important components of the state’s natural heritage. By understanding their characteristics, habitats, and conservation efforts, we can coexist with these creatures while ensuring our safety.

Respecting their space and appreciating their ecological roles can contribute to the preservation of these remarkable species for future generations to appreciate and protect.

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