Why Oxfordshire's gardens matter for bats

Oxfordshire is a quietly excellent county for bats. The Thames and Cherwell valleys, the wooded slopes of the Chilterns, and the hedgerow-lined farmland between them provide rich feeding corridors. At least ten species have been recorded here, from the common and soprano pipistrelles that often circle gardens at dusk, to the brown long-eared bat with its astonishingly sensitive hearing, the fast-flying noctule, and Daubenton's bat, which skims low over water. But bats need more than countryside. They need a network of safe, insect-rich places to feed and roost — and your garden can be a vital part of that network. A single garden might not seem like much, but joined with neighbours' plots, allotments and local green spaces, it becomes a nocturnal larder and a series of stepping stones. The good news is that encouraging bats is mostly about doing less: less light, fewer chemicals, and a little more wildness.

Plant a night-time larder

Bats are insectivores. A single pipistrelle can eat around 3,000 small insects in a night, so the more moths, midges, beetles and craneflies your garden supports, the better. Many of the best plants for bats are those that release their scent after dark, because they have evolved to attract nocturnal moths. These flowers are often pale or white, making them easier for moths to find in dim light.

• Evening primrose — tall, luminous yellow blooms that open at dusk and draw in moths.
• Night-scented stock — unassuming by day, but its sweet perfume after sunset is a magnet for moths.
• Honeysuckle — a classic cottage garden climber whose evening fragrance brings in long-tongued moths.
• Jasmine — especially the summer jasmine, which flowers late into the evening.
• Lavender — a favourite of bees by day and still useful for insects at night.
• Buddleia — the butterfly bush also attracts moths, particularly if you leave some flowers to go to seed.

Alongside flowers, think about structure. A patch of long grass, a native hedge, or a small log pile will support larvae and adult insects. Avoid insecticides completely — not just on flowers, but on lawns and vegetables too. Even a single spray can remove a night's worth of food for a bat. If you have space, a pond or a boggy corner is superb. Fresh water brings in midges and other small flies, and Daubenton's bats may visit larger ponds to hawk insects just above the surface.

Keep the night dark

Light pollution is one of the biggest threats to bats in towns and villages. Many species avoid brightly lit areas because it makes them vulnerable to predators and disrupts their feeding. Some bats will circle a floodlit garden, but they are usually the more adaptable pipistrelles; rarer species such as barbastelle and brown long-eared will simply stay away. The solution is not to live in total darkness, but to light only what you need, when you need it.

• Use motion sensors so lights are on only briefly, not all night.
• Choose warm white or amber bulbs rather than harsh blue-white LEDs.
• Point lights downwards and shield them so the beam stays on the path, not the hedge or tree canopy.
• Switch off unnecessary security lights, especially near known roosts or water.
• Close curtains to stop indoor light spilling into the garden.

If you have a neighbour with a brightly lit garden, a gentle conversation about wildlife-friendly lighting can make a real difference. Dark corridors between gardens are as important as dark gardens themselves.

Provide safe roosts

Bats need somewhere to sleep, shelter from weather, and raise their young. In Oxfordshire, common pipistrelles often roost in gaps behind tiles, under eaves, or in cavity walls. Brown long-eared bats prefer old trees and barns. You can help by leaving existing features alone and by adding purpose-built roosts.

• Bat boxes — mount them high on a south or west-facing wall, away from cats and artificial light. Two or three boxes of different designs increase the chance of occupation.
• Trees — retain mature trees, especially those with hollows, loose bark or ivy. If you must prune, do it in late autumn or winter.
• Roof spaces — if you are re-roofing, consider leaving a small gap or fitting a bat access tile. Never block an existing roost; bats and their roosts are legally protected in the UK.

It can take a year or more for bats to find a new box, so patience is key. A box that stays empty might still be used as a temporary night roost.

Water, shelter and a little mess

A wildlife pond, even a small one, is one of the best investments for bats. It need not be large: a half-barrel with native oxygenating plants will attract insects. If you already have a pond, keep some shallow edges and avoid introducing fish, which eat larvae. Leave a wild corner — nettles, brambles and seed heads are all insect nurseries. Compost heaps are excellent too, generating warmth and a steady supply of flies and beetles. Finally, think about cats. A well-fed cat with a bell on its collar is still a predator; keeping it indoors from dusk until dawn protects bats as well as birds and small mammals.

Watching your nocturnal visitors

You do not need specialist equipment to enjoy bats. On a warm evening from April to October, sit quietly near a hedge or pond about twenty minutes after sunset. Listen for the high, sharp ticks and clicks of echolocation — though many are beyond human hearing. A basic bat detector, which lowers the frequency to an audible range, will reveal a surprising amount. Pipistrelles produce fast, rhythmic clicks; noctules have a slower, more mechanical sound; brown long-eared bats are often so quiet you may only hear them at close range. Keep a notebook of dates and species, and you will build a picture of how your garden is used through the seasons. Every dark, insect-friendly garden in Oxfordshire is a small but meaningful refuge for these remarkable nocturnal mammals.