Endangered and Threatened Animal Species

Endangered Species Act (ESA) Endangered, Threatened, and Candidate Species List for Rocky Mountain National Park

The following table contains a list of species that are specific to Rocky Mountain National Park and are federally listed as endangered, threatened or candidates for listing, by the U.S. Fish and Wildlife Service under the provisions of the Endangered Species Act. The U.S. Fish and Wildlife Service has reviewed the list and provided a letter of concurrence dated January 15, 2004.

The species that are included in the table must meet one of the following criteria:

• The species is known to occur within the park.
• The species does not occur within the park, but suitable habitat is available, the habitat is within the known elevation range for the species, and the species is known to exist in counties that the park occupies.
• The species does not occur within the park, but actions within the park have the potential to affect the species.

In compliance with the Endangered Species Act, all management actions within the park are evaluated to determine if they will have any effect on endangered, threatened or candidate species on this list.

Federally Listed and Candidate Species & Their Status in Colorado	Known to Occur in RMNP	Known to Occur in Boulder County	Known to Occur in Larimer County	Known to Occur in Grand County
Amphibians
Boreal toad, Bufo boreas boreas, Candidate for Listing	Yes	Yes	Yes	Yes
Birds
Least tern, Sterna antillarum, Endangered	No	▲	▲	No
Mexican spotted owl, Strix occidentalis lucida, Listed Threatened	No	Yes Historically	Yes Historically	No
Piping plover, Charadrius melodus, Threatened	No	▲	▲	No
Whooping crane, Grus americana, Endangered	No	▲	▲	No
Yellow-billed cuckoo, Coccyzus americanus, Candidate for Listing	Yes Historically	No	Yes	Yes
Fish
Bonytail, Gila elegans, (presumed-historical) Endangered	No	No	No	*
Colorado pikeminnow, Ptychocheilus lucius, Endangered	No	No	No	*
Greenback cutthroat trout, Oncorhynchus clarki stomias, Threatened	Yes	Yes	Yes	No
Humpback chub, Gila cypha, Endangered	No	No	No	*
Pallid sturgeon, Scaphirhunchus albus, Threatened	No	▲	▲	No
Razorback sucker, Xyrauchen texanus, Endangered	No	No	No	*
Mammals
Canada lynx, Lynx canadensis, Threatened	Yes	Yes	Yes	Yes
Preble's meadow jumping mouse, Zapus hudsonius preblei, Threatened	No	Yes	Yes	No

Table Terminology

* Water depletions in the Upper Colorado River basin may affect these species
▲ Water depletions in the South Platte River basin may affect these species
Candidate means there is sufficient information indicating that formal listing under the ESA may be appropriate
Endangered means the species could become extinct
Threatened means the species could become endangered

Last modified 12/2004