Timber Rattlesnake
Crotalus horridus
Tennessee's largest venomous snake and one of the most medically significant in North America. Timber rattlesnakes are present across Middle Tennessee — less common in dense suburbs but found in wooded lots, rural properties, and the forested edges of the Nashville metro.
(615) 613-5992Timber rattlesnakes are venomous and protected by Tennessee state law. Do not attempt to handle or kill one. Call (615) 613-5992 for licensed, legal removal.
Tennessee's largest venomous snake.
The timber rattlesnake is a large, heavy-bodied pit viper found throughout Tennessee's forests and wooded areas. In Middle Tennessee, they occupy the wooded ridges, rocky outcroppings, and forested edges that still exist within and around the Nashville metro — including semi-rural properties in Williamson, Wilson, Robertson, and Dickson counties.
Despite their fearsome reputation, timber rattlesnakes are among the most docile of the venomous species — they rely heavily on camouflage and will often remain motionless rather than rattle or strike. Most encounters occur when someone unknowingly approaches too closely. Their venom, however, is potent and a bite requires immediate emergency medical treatment.
How to identify a timber rattlesnake.
Timber rattlesnakes are large and distinctive — the rattle alone is usually definitive. But coloration varies significantly, and silent juveniles can be harder to identify.
Rattle
The definitive identifier. A segmented keratin rattle at the tail tip. Juveniles have only a small button at birth; a new segment is added with each shed. The rattle may not always be audible — a resting snake may not rattle at all.
Size
Adults typically 36–60 inches. Large individuals can exceed 72 inches. One of the largest venomous snakes in North America. Heavy-bodied relative to length.
Color phases
Two color phases exist in Tennessee: a yellow phase (yellow or tan base with dark brown or black chevron crossbands) and a dark phase (nearly black overall with faint banding). Both phases occur in Middle Tennessee.
Chevron banding
The crossbands are chevron-shaped — pointing forward toward the head — rather than the hourglass shape of a copperhead. A rust-colored or orange dorsal stripe runs along the spine in many individuals.
Triangular head
Broad, flat, and distinctly triangular — much wider than the neck. The facial pit organs between the eye and nostril are visible at moderate range.
Velvet-black tail
The tail, just before the rattle, is typically solid black — a useful field mark that distinguishes timber rattlesnakes from other patterned snakes.
Timber rattlesnake lookalikes in Tennessee.
The rattle makes adult timber rattlesnakes nearly unmistakable. Juveniles and dark-phase adults are more likely to cause confusion.
Eastern Hognose Snake
Non-venomousWhen threatened, hognose snakes flatten their head and neck to appear larger — a display that can look alarming. They also vibrate their tail in leaf litter, producing a rattling sound. Non-venomous and completely harmless.
Black Rat Snake (adult)
Non-venomousLarge, dark, and heavy-bodied — adult black rat snakes are sometimes mistaken for dark-phase timber rattlesnakes. No rattle, no triangular head, and a more slender body profile distinguish them.
Juvenile Timber Rattlesnake
VenomousYoung timber rattlesnakes have only a small button rattle and are more vividly patterned than adults. They're venomous from birth and should be treated with the same caution as adults.
Copperhead
VenomousBoth are pit vipers with patterned bodies, but copperheads are smaller, have hourglass banding (not chevrons), and lack a rattle. In areas where both species occur, the banding pattern and tail tip are the key distinguishing features.
Where timber rattlesnakes live in Middle Tennessee.
Timber rattlesnakes prefer forested terrain with rocky features. In the Nashville area, they're most common on the rural and semi-rural fringes of the metro.
Forested ridges and hillsides
Classic timber rattlesnake habitat — south-facing rocky slopes with mixed hardwood forest. Common in the Highland Rim counties surrounding the Nashville Basin.
Rocky outcroppings and bluffs
Timber rattlesnakes use rock outcroppings for thermoregulation and as denning sites. Properties with exposed limestone or sandstone features are higher-risk.
Wooded lots and forest edges
Semi-rural properties with significant tree cover in Williamson, Wilson, Robertson, and Dickson counties can harbor timber rattlesnakes, particularly near forested ridges.
Fallen logs and debris
Timber rattlesnakes hunt from ambush positions — coiled beside fallen logs, stumps, and large rocks where small mammals travel. Wooded properties with significant debris are higher-risk.
Communal den sites
Timber rattlesnakes den communally in winter, often in rock crevices on south-facing slopes. Den sites are used year after year and can concentrate multiple snakes in a small area in spring and fall.
Agricultural edges
Field edges, hedgerows, and the margins between agricultural land and forest are productive hunting grounds. Rural properties in the outer Nashville counties regularly encounter timber rattlesnakes.
Timber rattlesnake bites: what you need to know.
Potentially life-threatening. Timber rattlesnake venom is hemotoxic and neurotoxic — it destroys tissue, disrupts blood clotting, and in some populations contains a neurotoxic component. Bites deliver a large volume of potent venom and require immediate emergency treatment. Fatalities are rare with prompt antivenom administration but tissue loss and serious complications are possible.
Get away and call 911
Move away from the snake immediately and call 911. Timber rattlesnake bites are a serious medical emergency. Do not attempt to catch or kill the snake — the ER does not need it.
Stay calm and still
Excitement increases heart rate and speeds venom distribution. Keep the victim as calm and still as possible. Have someone else drive to the hospital — do not drive yourself.
Immobilize the limb
Keep the bitten limb immobilized and below heart level. Remove rings, watches, and tight clothing near the bite site before swelling begins.
No folk remedies
Do not cut, suck, apply ice, or use a tourniquet. These methods cause additional harm and delay effective treatment. Antivenom at a medical facility is the only treatment that works.
Frequently asked questions about timber rattlesnakes.
Are timber rattlesnakes common in the Nashville area?
Less common than copperheads in suburban areas, but present throughout Middle Tennessee — particularly in the wooded, semi-rural counties surrounding the Nashville Basin. Williamson, Wilson, Robertson, Dickson, and Cheatham counties all have established timber rattlesnake populations. They're less likely to be found in dense suburban neighborhoods but are regularly encountered on wooded lots and rural properties.
Do timber rattlesnakes always rattle before striking?
No — this is a dangerous misconception. Timber rattlesnakes often remain silent and motionless when approached, relying on camouflage rather than warning. They may rattle as a last resort when they feel cornered or directly threatened, but many bites occur without any audible warning. Never assume the absence of rattling means the snake is non-venomous.
Are timber rattlesnakes protected in Tennessee?
Yes. Timber rattlesnakes are listed as a Species of Special Concern in Tennessee and are protected under state law. It is illegal to kill, collect, or harass them without a permit. A licensed wildlife removal professional can legally remove them from your property and relocate them to appropriate habitat.
How do I know if I have timber rattlesnakes on my property?
Direct sightings are the most reliable indicator. Shed skins — large, with a rattle button or segments attached — are also diagnostic. If you're on a wooded, semi-rural property in the outer Nashville counties with rocky terrain or significant forest cover, the habitat is suitable and professional assessment is worthwhile.
What should I do if I find a timber rattlesnake on my property?
Keep people and pets away from the area and call a professional immediately. Do not attempt to handle, kill, or relocate the snake yourself. Timber rattlesnakes are protected by state law, and attempting to handle one is the most common cause of serious snakebite. We can remove it legally and safely.
Timber rattlesnake removal near you
We handle timber rattlesnake encounters across Nashville's outer counties and wooded communities throughout Middle Tennessee.
Timber rattlesnake on your property?
Protected by state law — don't attempt removal yourself. We handle it legally, safely, and same-day across Middle Tennessee.