Invasive Species Rule – NR 40 terminology

Prohibited

Invasive species that are not currently found in Wisconsin, with the exception of small pioneer stands of terrestrial plants and aquatic species that are isolated to a specific watershed in the state or the Great Lakes, but which, if introduced into the state, are likely to survive and spread, potentially causing significant environmental or economic harm or harm to human health.

Restricted

Invasive species that are already established in the state and cause or have the potential to cause significant environmental or economic harm or harm to human health and include established nonnative fish and crayfish, fish in the aquaculture trade, fish in the aquarium trade and non-viable fish species.

For more information on NR 40, visit our invasive species rules and regulations webpage.