There is something quietly satisfying about a corner of the garden that you stop tidying. Leave a few fallen branches where they land and within a season or two that spot will be busier than any border you could plant. A log pile is simply the deliberate version of that, and it is one of the cheapest, kindest things you can do for wildlife on a British plot.

Why Deadwood Matters So Much

Rotting wood is one of our scarcest habitats. Centuries of tidying, clearing and burning have left Britain with a fraction of the deadwood it would naturally hold, and the creatures that depend on it — from stag beetles to specialist fungi — have declined with it.

A log pile replaces a little of what has been lost. As the wood decays it holds moisture, stays cool in summer and frost-free in winter, and slowly breaks down into the crumbly, fungal-rich material that beetles, amphibians and invertebrates need. It also feeds the soil around it and gives birds a steady supply of grubs. You are not just making a shelter; you are starting a small, slow ecosystem.

Choose a Quiet, Damp-ish Corner

Position matters more than size. Look for a spot that stays shaded for most of the day — under a hedge, beside a shed, in the dappled shade of a native tree, or on the north side of a fence. Rot needs moisture, and a pile in full sun will simply dry out and sit there looking ornamental rather than working.

• Damp but not waterlogged ground is ideal; avoid a spot that floods in winter.
• Keep it at least a metre from house walls and timber structures to avoid trapping damp against them.
• Near a pond or boggy patch, it will be found quickly by frogs and newts.
• A south-facing edge is a bonus, as invertebrates will bask there on sunny mornings.

If you have room, build two small piles in different conditions rather than one large one. Different light and moisture levels support different species.

Which Logs to Use

Native hardwoods are the best choice, and the more variety the better. Oak, ash, beech, birch, hazel, field maple, willow, wild cherry and crab apple all decay at different rates, which keeps the pile useful for years. Aim for a mix of sizes: a few chunky logs of 10–30cm diameter, plus smaller branches and twigs.

• Leave the bark on. Many invertebrates live and feed under it, and it slows drying.
• Mix fresh and rotten. Some sound logs for long-term structure, some already soft and spongy for instant colonisation.
• Never use treated, painted, varnished or composite timber. Decking offcuts, old pallets, MDF and chipboard have no place in a wildlife pile.
• Don't raid a local wood. Fallen deadwood belongs to the woodland and its inhabitants.

Stacking It Well

The aim is a loose, uneven heap with gaps and a slightly hollow centre. Contact with the ground is essential — that is where the rot begins and where many beetles lay their eggs.

• Set the bottom layer of logs half-sunk into the soil, or bed them into a shallow scrape.
• Alternate the direction of each layer so gaps and tunnels form naturally.
• Stand a few logs upright at one end to mimic a dead standing trunk.
• Roughly 40–60cm high and a metre or two long is plenty; bigger piles take longer to settle but last longer.
• Dress the base with fallen leaves, a little moss and a few stones, and leave the top open to the rain.

Do not cap it with soil or compost. Woodlice, centipedes and millipedes will arrive on their own within weeks.

Who Will Turn Up

The first arrivals are usually woodlice, millipedes, centipedes and small beetles. Over a year or two the pile becomes far more interesting. Solitary bees and bumblebee queens nest in the gaps, and slow worms and grass snakes use the warm edge for basking. Frogs, toads and newts shelter under damp logs, which means fewer slugs in your borders. Hedgehogs may use it as a daytime resting place.

Fungi follow the moisture: bracket fungi on the sides, jelly fungi in the damp crevices, and slime moulds on the underside of damp bark. Wrens and robins will work the pile for grubs, and the insects it produces feed bats at dusk. In south-east England, a buried, rotting log is exactly where a female stag beetle looks to lay her eggs.

The Hard Part: Leaving It Alone

A log pile rewards neglect. Every time you turn it, lift it or rearrange it, you disturb whatever is inside. So resist the urge.

• Do not move the pile once built. If you want to add wood, place it on top.
• Avoid all disturbance from October to March, when amphibians, insects and hedgehogs may be hibernating.
• Add new logs in spring or early autumn, when creatures can simply shift aside.
• Be patient. A pile takes two to three years to become properly inhabited, and it keeps improving as it sinks and softens.

Expect it to look a little untidy. That is the point. Ten years from now, when the wood is crumbling and soft and the pile has half-sunk into the ground, it will be at its richest, and you will have built something that no planting scheme could imitate.