Why Small Woods Matter for Bats

British bats have suffered decades of decline. Loss of roosts, fewer insects, and fragmented landscapes have all taken a toll. Yet a small woodland — even just a few acres — can be a genuine refuge. Common pipistrelles, soprano pipistrelles, brown long-eared bats, and Natterer's bats will all use modest copses if the right features are present. Noctules prefer taller trees, while Daubenton's bats need water nearby. The key is to provide three things: safe roosts, unlit flight lines, and abundant insect prey. Traditional woodland management, from coppicing to hedge laying, created these conditions for centuries. With a few thoughtful interventions, you can recreate them.

Installing Bat Boxes That Work

Bat boxes are not a substitute for old trees, but they are a valuable stopgap. Choose untreated, rough-sawn timber — oak, larch, or Douglas fir — at least 20mm thick. Avoid plywood, chipboard, and any timber treated with preservatives. A simple crevice box, with a 20–30mm gap, suits pipistrelles. Larger boxes, 60cm tall with a 40mm entrance, may attract noctules. Mount boxes 4–6 metres up on mature trees, facing south to south-west. Shelter them from prevailing winds and direct midday sun. Place them in clusters of three to five, as bats often move between roosts. Keep the entrance clear of branches. Use galvanised nails or stainless screws, and check boxes annually for wasps or squirrels. Making your own from sawmill offcuts is a satisfying traditional craft — and it lets you tailor sizes to your local species.

• Use untreated timber at least 20mm thick.
• Face boxes south to south-west, 4–6m high.
• Cluster three to five boxes per tree or group.
• Clean or repair boxes each autumn.

Leave Dead Trees Standing — With Care

Standing deadwood — often called stags — is one of the most valuable habitats in a wood. Rot holes, loose bark, and cracks provide roosts for bats, as well as nesting sites for birds and homes for invertebrates. A single veteran oak can support a maternity colony of brown long-eared bats. But safety matters. If a dead tree leans over a public path, do not simply fell it. Instead, reduce it to a monolith: cut the trunk at 2–3 metres, remove heavy limbs, and leave the standing stump. This retains the rot hole while removing the risk. Never clear all dead trees. Aim for at least three to five standing dead trees per hectare, plus fallen logs. Traditional crafts such as dead hedging — weaving cut branches into a boundary — can use material from safety work while creating habitat piles.

Managing Rides as Bat Flight Lines

Bats commute along woodland rides, hedgerows, and watercourses. A ride is not just a track; it is a corridor. To make it work for bats, avoid straight, uniform edges. Instead, create scalloped margins and a varied height structure. A width of 6–10 metres suits many species, but lesser horseshoe bats prefer narrower, darker rides. Coppice along the edges on a rotation of 7–15 years. This lets light reach the ground, boosting insect numbers, while retaining some standard trees. Hedge laying along boundaries keeps a dense base and a loose top — ideal for bats to fly along. Crucially, keep rides dark at night. Avoid security lighting or floodlights. Traditional coppicing produces poles for hurdle-making, thatching spars, and charcoal. Those crafts keep the cycle going, and the bats benefit from the resulting mosaic.

Working with the Seasons and Local Expertise

Timing is everything. Bats are most vulnerable from May to August, when females form maternity colonies. Avoid major tree work then. Hibernation runs from November to February, so leave roosts undisturbed in winter too. The traditional coppicing season — October to March — is actually well suited to bats, provided you avoid known roosts. Before any work, walk the wood at dusk with a bat detector. Note where bats emerge and which routes they follow. Local bat groups are often happy to survey and advise. They can help you identify species and plan a management cycle that balances safety, craft, and conservation. With patience, a small wood can become a haven — not just for bats, but for the traditional skills that shaped our landscape.