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Timber Rattlesnake

Crotalus horridus

iNaturalist Wikipedia

A master of camouflage and a symbol of the American wilderness, the Timber Rattlesnake is a patient forest guardian. Though often feared, this docile pit viper is a vital predator that maintains the balance of eastern ecosystems.

0 Sightings

0 Habitats

Quick Identification

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Size

Adults typically measure 36–60 inches (91–152 cm) in length and weigh between 1.1 and 3.3 pounds (0.5–1.5 kg).

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Colors

Varied base colors of sulfur yellow, gray, or tan with dark brown to black V-shaped crossbands or chevrons; tail is solid velvet-black.

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Key Features

Distinctive segmented rattle at the tail tip
Large, triangular head with heat-sensing pits between the eye and nostril
Dark chevron-shaped bands across the back
Velvet-black tail just before the rattle
Vertical, cat-like pupils

When You’ll See Them

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Activity pattern Active day and night

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Peak hours 6-10 AM and 5-9 PM in summer; mid-day during cooler spring/fall months

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Season April–October

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Diet Primarily small mammals like squirrels, chipmunks, and white-footed mice, but they also consume birds and occasionally other snakes.

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Habitat Mature deciduous forests, rocky hillsides, and occasionally lowland swamps or cane thickets.

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Where Does the Timber Rattlesnake Live?

Native to the North American continent, the Timber Rattlesnake occupies a broad range across the eastern and central United States. Its territory extends from the rugged hills of southern New England down through the Appalachian Mountains to northern Florida, stretching as far west as eastern Texas and the Great Plains of Nebraska. While they were historically found in parts of southern Canada, they are now considered largely extirpated there, making the U.S. the primary stronghold for this majestic forest dweller.

Basemap © OpenStreetMap contributors

2 Countries

1.2M km² Range

Least Concern Conservation

US United States CA Canada

Elevation range

0 m1,000 m2,000 m4,000 m

Sea level – 2,000 m

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iNaturalist / Verified observation data

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Behavior

Timber Rattlesnakes are quintessential ambush predators, often spending days coiled in a tight spiral near fallen logs or game trails. They are remarkably patient, relying on their sophisticated heat-sensing pits to detect the infrared signatures of passing prey. Despite their formidable reputation, they are generally shy and reclusive animals that prefer to remain undetected. Their first line of defense is their incredible camouflage, followed by a hasty retreat or the famous rattling of their tail as a final warning to stay away.

These snakes are known for their high site fidelity, often returning to the exact same sunning rocks and overwintering dens, or hibernacula, for decades. In the winter, they congregate in deep rocky crevices below the frost line, sometimes sharing these spaces with other snake species. During the summer, males and non-gravid females may wander several miles from their dens to forage, while pregnant females stay closer to rocky 'basking' sites to maintain the high body temperatures needed for embryo development.

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Camera Tips

To capture high-quality footage of a Timber Rattlesnake, focus your camera placement on 'linear features' in the landscape. These snakes frequently use large fallen logs as highways and hunting blinds. Position your camera about 12 to 18 inches off the ground, aimed at a 45-degree angle toward the side of a log where a snake might be coiled or traveling. Because snakes are cold-blooded, they may not always trigger standard PIR motion sensors; using a camera with high sensitivity or a dedicated 'time-lapse' mode that fires every 30 to 60 seconds is often the most effective way to ensure you don't miss a passing viper.

Sun-drenched rocky outcroppings are another prime location, especially in the early spring (April to May) and late fall (September to October). These are basking sites where snakes gather to regulate their body temperature. During the heat of mid-summer, the snakes often become more active at night to avoid the sun, so ensure your camera has a high-quality 'no-glow' infrared flash. This prevents the snake from being startled by a visible light, allowing you to capture natural nocturnal behaviors like tongue-flicking and hunting.

Safety must be your absolute priority when setting cameras in rattlesnake habitat. Never place your hands or feet where you cannot see, such as under logs or inside rock crevices. Use a long stick to clear debris around your camera mounting point, and consider wearing snake-proof gaiters when venturing into known habitats. For the best visual results, set your camera to 'Hybrid Mode'—capturing a high-resolution still image followed by a 10-15 second video clip. This allows you to see the snake's subtle movements and listen for the rattle, providing a much richer look at their behavior than a photo alone.

Similar Species

Species that look similar or are commonly confused with Timber Rattlesnake.

Copperhead

Copperheads lack a rattle, have 'Hershey's Kiss' shaped markings, and have a copper-colored head without the black tail section.

Eastern Diamondback Rattlesnake

The Diamondback has distinct light-centered diamond patterns rather than the Timber's chevrons, and prefers coastal pine flatwoods.

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Frequently Asked Questions

Their activity depends on the temperature. In the mild weather of spring and fall, they are primarily diurnal (active during the day). However, during the hot summer months, they often become crepuscular or nocturnal, moving and hunting at dawn, dusk, or throughout the night to avoid overheating.

While most people prefer to keep venomous snakes away from their immediate porch, you can encourage them in larger wilder properties by maintaining natural rock walls, leaving large fallen logs in place, and preserving mature hardwood forest. They are attracted to areas with high rodent populations, so natural brush piles away from the home are ideal.

They are specialist predators of small mammals. Their diet consists mostly of white-footed mice, chipmunks, and gray squirrels. They also occasionally eat ground-nesting birds like ovenbirds or turkeys, using their venom to quickly subdue prey before swallowing it whole.

They are much less common in suburbs than species like Garter Snakes or Black Racers. Timber Rattlesnakes require large, contiguous tracts of forest and specific rocky denning sites. However, as suburban sprawl encroaches on their habitat, they are occasionally seen on the edges of wooded neighborhoods.

The most obvious difference is the rattle at the end of the tail, which Copperheads lack. Additionally, Timber Rattlesnakes have dark chevron or V-shaped bands and a solid black tail, whereas Copperheads have 'Hershey's Kiss' or hourglass-shaped markings and a tan or copper-colored tail.

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