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Species of Interest


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.

Delisted - Species that are no longer threatened or endangered. The Endangered Species Act of 1973 requires five-year monitoring for species that have recovered and been delisted. [Learn more]

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]