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Threatened, Endangered, and Candidate Species

  • Endangered- Any species in danger of extinction throughout all or a significant portion of its range.
  • Threatened- Any species likely to be classified as endangered within the foreseeable future throughout all or a significant portion of its range.
  • Candidate- Any species that is undergoing a review process for possible listing as endangered or threatened.
  • Proposed Threatened- A species undergoing a review process to determine if it will be listed for protection under the ESA.
  • Designated Critical Habitat- A geographic area(s) that contains essential features for the conservation of a species.

Listed Species in Idaho






  • Goose Creek milkvetch (Astragalus anserinus)

  • MacFarlane’s four-o’clock (Mirabilis macfarlanei)

  • Slickspot peppergrass (Lepidium papilliferum)

  • Spalding’s catchfly (Silene spaldingii)

  • Ute ladies’- tresses (Spiranthes diluvialis)

  • Water howellia (Howellia aquatilis)

  • Whitebark Pine (Pinus albicaulis)