Global warming has result in increased mountain pine beetle activity. It attracts the western pine beetle and mountain pine beetle. The variation in their serotiny has been correlated with wildfires and mountain pine beetle attacks. Infestations by mountain pine beetles have killed many lodgepole pines in the area. The current outbreak of mountain pine beetles is ten times larger than previous outbreaks. Verbenone is also used to manage mountain pine beetle ("Dendroctonus ponderosae") infestations. Natural predators of the mountain pine beetle include certain birds, particularly woodpeckers, and various insects. Bones was born in Hot Springs, Arkansas, and raised in Mountain Pine, Arkansas. The mountain pine beetle emits a pheromone to attract other beetles to a tree. Mountain Pine Beetle are a species native to Western North America. Many species, such as the mountain pine beetle ("Dendroctonus ponderosae") attack and kill live trees. Pine naturally grows in the Mountain Pine Ridge, which is accessible via the Macal River. Mountain pine beetles affect pine trees by laying eggs under the bark. Mountain pine beetles inhabit ponderosa, whitebark, lodgepole, Scots, jack pine, and limber pine trees.