European nightjars are specialist heathland and open woodland breeders whose population recovery depends on habitat management and disturbance reduction.
Ground-nesting nightjars disturbed by dogs, walkers, or recreational vehicles face egg exposure to temperature extremes and predation risk when they flush from nests. Chicks unable to flee quickly are vulnerable to trampling and predator attraction. Insect population decline reduces food availability, increasing the energy investment required per foraging trip. Dogs allowed to roam in heathland habitat during nightjar breeding season cause disproportionate disturbance relative to their numbers.