Wildlife

Common Pipistrelle: Garden Bat Facing Roost Loss

The common pipistrelle is Britains most abundant bat but faces ongoing habitat loss from building renovation and insect decline.

Key Facts

Common pipistrelles weigh only 3 to 8 grams making them one of the smallest British mammals
A single pipistrelle can eat 3,000 insects in one night
They roost in gaps in buildings particularly under roof tiles and in cavity walls
UK population is estimated at several million but has declined from historic levels
Common pipistrelles use a narrow echolocation frequency around 45 kilohertz

Welfare Considerations

Common pipistrelles face welfare challenges from building renovation that seals roost access points. Maternity roosts with pups may be sealed during construction causing pups to die. Insecticide use in roof spaces to treat timber kills roosting bats. Flying insects decline from intensive farming reduces food availability. Light pollution disrupts emergence behaviour causing delay in foraging onset.

What You Can Do

Check for bat roosts before any building work and consult a licensed surveyor
Install bat bricks and tubes when renovating buildings to maintain roost access
Reduce light pollution around buildings with known pipistrelle roosts
Support insect-friendly gardening to maintain local bat food supply
Participate in National Bat Monitoring Programme transect surveys