Montana Field Guide

Population Size

Score1 - Moderate: Generally 10,000-100,000 individuals.

Range Extent

Score0 - Widespread species within Montana (occurs in 5% or more of the state or generally occurring in 6 or more sub-basins.) as well as outside of Montana.

Area of Occupancy

Score0 - High: Occurs in >25 Subwatersheds (6th Code HUC’s).

Environmental Specificity

Score1 - Moderate: Species is restricted to a specific habitat that is more widely distributed or to several restricted habitats and is typically dependent upon relatively unaltered, good-quality habitat (C Values of 5-7).

Trends

Score0-1 - Stable to Minor Declines:

CommentUnknown

Threats

Score1 - Medium: 11-30% of the populations are being negatively impacted or are likely to be impacted by one or more activities or agents, which are expected to result in decreased populations and/or habitat quality and/or quantity.

CommentLow levels of threats; Timber harvesting has the potential to negatively impact some occurrences and habitat.

Intrinsic Vulnerability

Score2 - High Vulnerability: Very specific biological attributes, unusual life history characteristics or limited reproductive potential makes the species highly susceptible to extirpation from stochastic events or other adverse impacts to its habitat and very slow to recover.

CommentSpecies is intrinsicly vulnerable as a result of unusual life history or biological attributes, which makes it vulnerable to localized extirpation.

Raw Conservation Status Score

Score 5 to 6 total points scored out of a possible 19.