| 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.
|
