| GRANK |
Definition |
| G1 |
Extremely rare; usually 5 or fewer occurrences in the overall range or very few remaining individuals; or because of some factor(s) making it especially vulnerable to extinction. |
| G2 |
Very rare; usually between 5 and 20 occurrences in the overall range or with many individuals in fewer occurrences; or because of some factor(s) making it vulnerable to extinction. |
| G3 |
Rare to uncommon; usually between 20 and 100 occurrences; may have fewer occurrences, but with a large number of individuals in some populations; may be susceptible to large-scale disturbances. |
| G4 |
Common; usually more than 100 occurrences; usually not susceptible to immediate threats. |
| G5 |
Very common; demonstrably secure under present conditions. |
| GH |
Historic, no records in the past 20 years. |
| GU |
Status uncertain, often because of low search effort or cryptic nature of the species; more data needed. |
| GX |
Globally extinct. No recent records despite specific searches. |
| ? |
Denotes inexact numeric rank (i.e. G4?). |
| G |
A "G" (or "T") followed by a blank space means that the NHIC has not yet obtained the Global Rank from The Nature Conservancy. |
| G? |
Unranked, or, if following a ranking, rank tentatively assigned (e.g. G3?). |
| Q |
Denotes that the taxonomic status of the species, subspecies, or variety is questionable. |
| T |
Denotes that the rank applies to a subspecies or variety. |
