Nightjars are migratory insectivores dependent on lowland heathland that has declined by 80% in the UK, with welfare implications from habitat loss and light pollution.
Heathland loss restricts breeding habitat to isolated fragments. Light pollution around urban heathlands suppresses moth prey activity reducing chick feeding opportunities. Ground-nesting birds are vulnerable to disturbance and predation; access management is critical. Drought events reducing insect activity cause chick starvation. Migration-route shooting adds mortality pressure.