ScoreU - Unknown
ScoreF - 20,000-200,000 km squared (about 8,000-80,000 square miles)
Comment66,589 square kilometers based on Natural Heritage Program range maps that appear on the Montana Field Guide
Area of Occupancy
ScoreU - Unknown
ScoreD - Moderate Decline (decline of 25-50%)
CommentCedar and Grand Fir forests have been heavily impacted in Western Montana with probably greater than 50% decline in these habitats since European arrival.
ScoreF - Increasing. Increase of >10% in population, range, area occupied, and/or number or condition of occurrences
CommentBBS data shows an insignificant increase of +13.7% per year or 361% increase per decade, but these data are classified as least credible. Idaho has moderate credibility with a significant increase of +4.3% per year or 52% increase per decade. Data from the Northern Rockies has moderate credibility and nonsignificant trend of +3.5% increase per year or 41% per decade.
ScoreE - Localized substantial threat. Threat is moderate to severe for a small but significant proportion of the population or area.
CommentDrying of mesic forest types as a result of climate change and the potential for fire and disease to result as a consequence are probably the greatest threats to this species.
SeverityModerate - Major reduction of species population or long-term degradation or reduction of habitat in Montana, requiring 50-100 years for recovery.
CommentMature cedar and grand fir forests take more than 50 years to regenerate.
ScopeLow - 5-20% of total population or area affected
CommentLikely not to lose up to 20% of remaining cedar/grand fir forests in the next couple of decades
ImmediacyLow - Threat is likely to be operational within 5-20 years.
CommentThreat is not fully operational now, but could be accelerating in coming years.
ScoreC - Not Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance; or species has high dispersal capability such that extirpated populations soon become reestablished through natural recolonization (unaided by humans).
CommentNot Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has a high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance. Species has good dispersal capabilities such that extirpated populations generally become reestablished through natural recolonization.
ScoreB - Narrow. Specialist. Specific habitat(s) or other abiotic and/or biotic factors (see above) are used or required by the Element, but these key requirements are common and within the generalized range of the species within the area of interest.
CommentNarrow Specialist. Species uses dense conifer forests across its range and Western Red-Cedar and Grand Fir Forests in Montana.
Raw Conservation Status Score
3.5 + 0.0 (geographic distribution) + 0.0 (environmental specificity) + 0.25 (short-term trend) + 0.0 (threats)