Managers at Hawaii Volcanoes National Park have adopted a plan to rid the park of non-native animals, mostly pigs and goats, which are damaging native vegetation.

The plan calls for population monitoring, shooting, snaring and baiting, as well as erecting fencing and moving the animals, a park official told the Hawaii Tribune-Herald.

Park Environmental Protection Specialist Danielle Foster said the park is updating a plan in place since the 1970s. “We try to shoot them first to control. It’s the quickest and most humane. But when something’s been elusive, we have a wide range of tools available.”