An invasive species is an alien [non-native] species whose introduction does or is likely to cause economic or environmental harm or harm to human health (Executive Order 13112). Species invasions are one of the main ecological consequences of global changes in climate and land use. Most invasions over the past several centuries have involved species transported directly or indirectly by humans. Forest Health Protection will continue to work very closely with its partners to manage native and non-native pests and reduce the flow of non-native invasive forest pests into the U.S. Forest Health Protection's vision is that the Forest Service will maintain a robust program that protects the nation's forests from extraordinary levels of damage from both native and non-native invasive insects, pathogens, and plants through the continued implementation of an integrated system of prevention, eradication, management, and restoration.

Invasive Forest Insects
Invasive Forest Pathogens
Invasive Plants