Little is known about its breeding habits, lifecycle, or life span. CONSERVATION STATUS
Not listed by the IUCN. It is considered Endangered in its entire range by the U. S. Fish and Wildlife Service. It was listed as Endangered under the U. S. Endangered Species Act in February 1995, after research showed that its population size and distribution was limited to only four sites, with only one stable site left. Its populations are believed to be diminishing because of rapid decline of damp, high-elevation old-growth forest habitats (especially the Fraser fir); decline brought about by infestation of exotic insect (balsam wooly adelgid) that has been killing off fir and spruce trees, air pollution brought about by acid rain, and past land use.
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