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Why Moles Become a Lawn Problem

Moles are solitary creatures that spend almost all their time underground, hunting earthworms and grubs. A single mole can tunnel up to 20 metres a day, and in doing so it pushes up the characteristic molehills that ruin a neatly mown lawn. On a smallholding, the damage can be worse: tunnels undermine pasture, let in air that dries out roots, and create trip hazards for livestock. The mole itself is not malicious — it is simply following its dinner. But when your lawn looks like a battlefield, tunnel traps become a practical and humane answer.

How Tunnel Traps Work

Tunnel traps are mechanical devices that sit inside a mole's run. The two most common types in the UK are the scissor trap and the pincer trap. Both are spring-loaded. When a mole passes through the tunnel, it triggers the trap, which closes quickly around the animal's body. A well-set trap kills instantly, so the mole does not suffer. This is why checking traps daily is not just a legal nicety — it is the heart of humane trapping. A trap that is left unchecked for days can cause unnecessary distress, and it may also catch the wrong animal.

These traps work because moles are creatures of habit. They use the same tunnels again and again, especially the straight, shallow runs just under the surface of a lawn. If you place a trap in an active tunnel, your chances of success are high. If you place it in an old or abandoned run, you will wait forever.

Finding Active Tunnels in Lawns and Smallholdings

Before you set any trap, you need to find a tunnel that a mole is using right now. Start by looking at the molehills. Fresh molehills are dark, damp and free of debris. Flatten a few with your foot and check the next morning. If new hills appear, you know the mole is active in that area.

Next, find the tunnel itself. For lawns, the best runs are usually shallow — just 5 to 10 centimetres below the surface. You can find them by gently probing with a blunt stick or a garden trowel. When the stick suddenly gives way, you have found a tunnel. Straight sections are best. Avoid curved or branching runs, as the trap may not sit properly. On smallholdings, look along fence lines, hedgerows and the edges of beds, where moles often travel.

• Probe gently: A sudden drop in resistance means you've found a run.
• Check for freshness: A clean, open tunnel with no roots or debris is likely active.
• Use surface runs: In lawns, shallow runs are easier to trap than deep ones.

Setting Your Trap Correctly

Once you have found a good tunnel, dig a neat hole just wide enough to take the trap. Remove any loose soil from the tunnel floor so the trap sits flush. Set the trap according to the maker's instructions — usually by compressing the spring and hooking the trigger. Place it so the trigger mechanism sits in the middle of the tunnel. The mole should have to pass through the trap to continue.

Cover the hole with a piece of turf, a flat stone or a slate. This keeps out light, rain and curious pets. Moles dislike draughts and light, so a covered trap is far more effective. Mark the spot with a small stick so you can find it again. Wear gloves if you like, both to protect your hands and to keep your scent off the trap. Finally, firm the soil around the edges so the tunnel looks natural.

Checking Daily and Trapping Responsibly

You must check your traps at least once every 24 hours. In practice, twice a day is better: early morning and late evening, when moles are most active. If you find a mole, it should already be dead. If it is still alive, you must dispatch it quickly and humanely — this is not a job for the faint-hearted, so if you are unsure, seek advice from a qualified professional.

Remember that tunnel traps can catch other wildlife. Hedgehogs, voles and even weasels sometimes use mole runs. If you catch a non-target animal, release it carefully away from the trap. Never set a trap if you cannot check it daily. And if you have a large lawn or a smallholding with many moles, consider whether a professional trapper might be more effective. Persistence pays off, but so does knowing when to call in help.