Location: The southern Rocky Mountain population occurs from south-central Wyoming southward through the mountainous regions of Colorado to extreme north-central New Mexico. The toads inhabit a variety of wet habitats (i.e., marshes, wet meadows, streams, beaver ponds, glacial kettle ponds, and lakes interspersed in subalpine forest) at altitudes primarily between 8,000-11,500 feet.
Threats: A globally occurring disease of amphibians that is commonly known as chydrid fungus is believed to be the major factor in the decline of the southern Rocky Mountain population of the boreal toad.
Recent Actions: On May 25, 2011, the Service received a petition from the Center for Biological Diversity, Center for Native Ecosystems, and Biodiversity Conservation Alliance, requesting the agency list either the Eastern population or Southern Rocky Mountain population of the boreal toad (Anaxyrus boreas boreas) as a threatened or endangered distinct population segment (DPS) under the Endangered Species Act (Act). We have completed a 90-day petition finding for the Eastern population and Southern Rocky Mountain population of the boreal toad. We have determined that there is substantial information in the petition and in our files that the Eastern population of the boreal toad may qualify as a DPS and that listing under the Act may be warranted. Additionally, we determined that the petition and our files did not contain substantial information that the Southern Rocky Mountain population of the boreal constitutes a DPS. However, the Southern Rocky Mountain population, which includes New Mexico, Colorado, and southeastern Wyoming, is part of the larger Eastern population. The Eastern population of this amphibian occurs in portions of Colorado, Idaho, New Mexico, Nevada, Utah, and Wyoming.
- Press Release: April 11, 2012 U.S. Fish and Wildlife Service to Initiate Status Review of Eastern Population of Boreal Toad
- Federal Register Notice: April 11, 2012 90–Day Finding on a Petition to List the Eastern or Southern Rocky Mountain Population of the Boreal Toad as an Endangered or Threatened Distinct Population Segment
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