To help conserve genetic diversity, the ESA defines “species” broadly to include subspecies and (for vertebrates) distinct populations.
Threatened - A “threatened species” is one that is likely to become endangered in the foreseeable future throughout all or a significant portion of its range.
Endangered - An “endangered species” is one that is in danger of extinction throughout all or a significant portion of its range.
Species of Concern - Montana Species of Concern are native animals breeding in the state that are considered to be "at risk" due to declining population trends, threats to their habitats, and/or restricted distribution.
Exotic - Exotic species are any species that is not native to that ecosystem. They are broken into three categories:
Aquatic Invasive (Nuisance) Species (AIS) - Aquatic Invasive Species are non-native plants, animals or pathogens that cause environmental or economic harm. [Learn more]