BLM Colorado Sensitive Wildlife Species of the Uncompahgre Field Office

¹ Identified as sensitive species by the Regional Forester (Region 2) of the United States Forest Service
² Identified as a "species of special concern" by the Colorado Division of Wildlife
³ Colorado Natural Heritage Program ranking

• G1 - critically imperiled globally (5 or fewer occurences or very few remaining individuals); critically endangered throughout its range
• G2 - imperiled globally (6 to 20 occurrences); endangered throughout its range
• G3 - very rare or local throughout its range or found locally in a restricted range (21 to 100 occurences); threatened throughout its range
• G4 - apparently secure globally, though it might be quite rare in parts of its range, especially at the periphery
• G5 - demonstrably secure globally, though it might be quite rare in parts of its range, especially at the periphery
  • T - taxa of subspecies or varieties, ranked on same criteria as G1-G5
• G#? Indicates uncertainty about an assigned global rank

• S1 - critically imperiled in Colorado (5 or fewer occurences or very few remaining individuals); critically endangered throughout Colorado
• S2 - imperiled in Colorado (6 to 20 occurrences); endangered or threatened in Colorado
• S3 - rare in Colorado (21 to 100 occurences)
• S3S4 Watchlisted; specific occurrence data are collected and periodically analyzed to determine whether more active tracking is warranted 
• S#B - refers to the breeding season imperilment of elements that are not permanent residents
• S#N - refers to the non-breeding season imperilment of elements that are not permanent residents; where no consistent location can be discerned for migrants or non-breeding population, a rank of SZN is used
• SZ - migrant whose occurences are too irregular, transitory and/or dispersed to be reliably identified, mapped and protected
• S#? Indicates uncertainty about an assigned state rank