In the 1970s and 1980s the island was used for big game hunting; non-native game animals such as Mouflon sheep from Corsica, fallow deer from Europe, and Sika deer from Asia – along with approximately 2,000 exotic birds such as african guinea fowl – were brought to the island. A hunting lodge, airstrip, and small hangar were built to accommodate visitors. The venture was short-lived, however, partially due to environmental concerns and also due to the risk of errant shots reaching nearby San Juan Island, which is relatively populated. The imported species continue to survive on the island.