Grey herons are successful opportunist predators but face conflict with anglers, fish farmers and garden pond owners. Evidence-based conflict management protects herons while addressing legitimate concerns.
Grey heron welfare is primarily threatened by illegal killing at fish farms and garden ponds. Herons attracted to fish are shot, poisoned and trapped despite their legal protection - enforcement is challenging because incidents occur on private land. The welfare and legal case for non-lethal deterrents is clear: netting ponds, installing motion-activated sprinklers, and using realistic plastic heron decoys are all effective at reducing heron predation without causing heron deaths. Fish farms that net their facilities legally protect their stock without killing protected birds. The costs of non-lethal deterrence are modest compared to the ecological and legal risks of illegal killing.