The noctule is the UK's largest bat, flying high above tree canopy level hunting large moths and beetles. Its welfare depends on mature woodland with veteran trees providing roosting cavities and open farmland for feeding.
Noctule welfare depends on two linked habitat requirements: veteran trees providing roost cavities and open farmland with abundant large flying insects. Loss of veteran trees through development, storm damage and active removal eliminates roost sites that took centuries to develop. Pesticide use on farmland reduces cockchafer and moth populations — the large prey items noctules specialise in. The species is also vulnerable to collision with wind turbines — a welfare concern at energy infrastructure sites. Night-time light pollution in the flight corridor between roosts and feeding areas can inhibit foraging. Garden light reduction and mature tree retention on rural estates directly supports noctule welfare.