WYNDD has developed a ranking system that indicates the contribution of WY populations of a taxon to the rangewide persistence of that taxon.
| Rank | Description |
|---|---|
| Very High | WY populations contribute greatly to the species’ rangewide persistence. Typically applies to species with small continental ranges that are centered on WY. Local endemics are included in this category, along with regional endemics concentrated in Wyoming. |
| High | WY populations contribute substantially to the species’ rangewide persistence when evaluated in combination with populations in adjacent states,. Typically applies to species that are more secure in WY than elsewhere and have a moderate proportion of their continental range in WY. Most regional endemics are included in this category. |
| Medium | WY populations contribute to the species’ rangewide persistence, but are apparently no more critical than populations in other states. Typically applies to native, resident taxa that are as secure in WY as elsewhere and have a moderate proportion of their continental range in WY. Disjuncts are included in this category. |
| Low | WY populations contribute minimally to the species’ rangewide persistence. Typically applies to taxa that are more prevalent and secure in other states, and occur only intermittently or peripherally in WY. |
