A snare trap is a simple wire or cable loop designed to catch an animal by tightening around its body or neck as it passes through. It’s one of the oldest trapping devices in human history, likely predating written records by tens of thousands of years, and it remains widely used today for wildlife management and fur trapping. Modern snares are typically made from braided steel cable rather than the plant fibers and sinew used by early humans, but the core principle hasn’t changed: an animal walks into a loop, and its own forward movement pulls the noose tight.
How a Snare Trap Works
A snare has just a few basic parts. The cable itself forms the loop, and one end passes through a small fitting called a lock or running eye. This creates the sliding noose. When an animal moves through the loop, the cable slides through the lock and cinches down. The other end of the cable attaches to an anchor, usually a heavy stake driven into the ground or a solid tree, that keeps the captured animal in place. Most modern snares also include a swivel, which lets the cable rotate freely so the animal’s movement doesn’t kink or weaken it.
Snares are typically set along trails, fence gaps, or other natural funnels where animals travel regularly. The trapper positions the loop at a height and diameter calculated to catch a specific species. A coyote snare, for example, might hang with the bottom of the loop about 10 to 12 inches off the ground, while a rabbit snare sits much lower.
Types of Locks
The lock mechanism is the most important variable in snare design, and it determines whether the snare restrains or kills the animal. There are three main categories.
- Relaxing locks loosen their grip when the animal stops pulling. The loop can open slightly when tension drops, which reduces pressure on the animal’s neck. These have the lowest killing potential and are used when the goal is to capture an animal alive.
- Positive locks hold their position once tightened. They don’t squeeze harder, but they don’t release either. The loop stays at whatever diameter the animal pulled it to.
- Power-assisted locks use a built-in spring or mechanical device that continues applying closing force even after the animal stops struggling. These have the highest killing potential and are designed specifically as lethal devices.
The distinction matters both legally and practically. Many jurisdictions ban self-locking or power-assisted mechanisms outright. In the UK, for instance, self-locking snares have been illegal since 1981 under the Wildlife and Countryside Act. Only free-running (relaxing) snares are permitted there.
Safety Features for Non-Target Animals
One of the biggest concerns with snares is that they can catch animals the trapper didn’t intend to capture, including pets, deer, livestock, or protected species. Modern regulations address this with several required safety features.
Breakaway devices are the most common solution. These are weak links built into the cable, such as S-hooks, J-hooks, or shear pins, that snap apart when a large animal pulls hard enough. Minnesota, for example, requires all land snares to include a breakaway device rated to release at 350 pounds of force or less. This allows large animals like moose, elk, bears, and adult deer to free themselves while still holding smaller target species like coyotes or foxes.
Loop size restrictions serve a similar purpose. Virginia law limits land snares to loops no larger than 38 inches in circumference (about 12 inches in diameter), which helps exclude larger animals from being caught in the first place. Snares set with the top of the loop higher than 12 inches off the ground face additional restrictions there, including mandatory cable stops that prevent the loop from closing smaller than 2.5 inches in diameter. This keeps the snare from fully constricting around a non-target animal’s neck.
Diverter wires, sometimes called deer stops, are stiff wires attached near the loop that deflect the noses of tall animals like deer upward and over the snare rather than through it.
Animal Welfare Concerns
Snares are among the most debated trapping tools because of welfare issues. Even snares intended to kill don’t always work quickly. Scientific studies on traplines have recorded a coyote that took over 14 hours to lose consciousness after being snared and a wolf that remained conscious for nearly 4 hours. In controlled studies with snowshoe hares, the average time to death was 18 minutes, which is considerably faster but still well beyond what most people would consider humane.
Animals caught in restraining snares face their own set of problems. They can suffer neck injuries, cut skin, and extreme stress during the hours before a trapper checks the line. When animals escape with a snare still tightened around their neck, they often face infection, an inability to eat, and a slow death. These concerns have driven several European countries to ban snares entirely. Austria, Cyprus, the Czech Republic, Denmark, Estonia, Germany, Greece, Hungary, Lithuania, Luxembourg, and Malta either prohibit snares or have no tradition of using them. In Europe, only Belgium, Ireland, Latvia, and the UK still permit their use.
Legal Status in the United States
Snare legality in the U.S. varies significantly by state. Some states allow snares with few restrictions during trapping season, while others ban them or impose detailed rules on loop size, lock type, set height, anchor method, and breakaway strength. A few states prohibit all snaring on public land but allow it on private property with the landowner’s written permission.
Common restrictions across states that do permit snares include maximum loop diameter (often 12 inches), maximum set height (typically 12 inches from ground to the top of the loop), mandatory daily or every-other-day trap checks, and required breakaway devices rated between 285 and 350 pounds. Virginia, as one example, bans power-assisted locks and cam-style locks on any snare set higher than 12 inches, and requires a one-piece lock with no moving parts at that height. These rules reflect an effort to balance pest control and fur harvesting against the risk of catching non-target animals.
Legal Status in the UK
The UK takes a more restrictive approach than most U.S. states. Self-locking snares are banned throughout England, Wales, Scotland, and Northern Ireland. Free-running snares remain legal but must be inspected at least once every 24 hours, and any captured animal, alive or dead, must be removed promptly. Scotland goes further by requiring all snare operators to complete a training course, register with Police Scotland, and display a unique identification number on every snare they set. Drag snares and any snare set where an animal could become suspended or drown are also prohibited in Scotland.
The British Veterinary Association and British Veterinary Zoological Society have jointly called for a complete ban on snares, arguing that even free-running models cause unacceptable suffering. The UK remains one of the few European countries where any form of neck snaring is still legal.
Common Target Species
In North America, snares are most often used for coyotes, foxes, raccoons, beavers, and rabbits. Wildlife management agencies sometimes use them for feral hog control or to capture wolves and bears for research and relocation, though these applications typically involve specialized equipment and trained personnel. In the UK, snares primarily target foxes and rabbits that damage crops or livestock.
The appeal of snares for trappers comes down to simplicity, low cost, and portability. A single snare weighs only a few ounces, costs a few dollars, and can be packed in large quantities. Unlike steel foothold traps, snares require no pan-tension adjustment or bedding in soil. They can be set quickly along a fence line or trail system, making them efficient for covering large areas. That same simplicity, however, is what makes them controversial: a device that’s easy to deploy widely is also one that’s harder to use selectively.