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Ranking Definitions
 
Global Rank
GRank: Priority ranking (1 to 5) based on the number of occurrences throughout the entire range of the element.
G1 Very Rare: 1 to 5 occurrences or very few individuals or acres.
G2 Rare: 6 to 20 occurrences or few individuals or acres.
G3 Uncommon or Restricted: 21 to 100 occurrences, rather rare throughout a fairly wide range, or fairly common in a rather restricted range.
G4 Apparently Secure: more than 100 occurrences, though it could be quite rare in some parts of its range.
G5 Demonstrably Secure: more than 100 occurrences.
GH Historic: presumed extinct in the wild though the possibility remains that it could be rediscovered; and/or the element exists in captive populations.
GU Unrankable. Also used at the subspecies level as G#TU.
GX Extinct: little or no possibility of ever being rediscovered anywhere within its range.
C Captive or Cultivated: presently extant globally only in captivity or cultivation. (Used in conjunction with a GRank, i.e. GXC, GHC.)
NE National Exotic: exotic to the United States of America. (Used in conjunction with a G#.)
G#Q Taxonomic Question: taxonomic status is questionable; numeric rank may change with taxonomy.
Q Taxonomically Invalid: taxon has been reassigned to another name; this is usually a Category 3B taxon under the Endangered Species Act. (Not used in conjunction with a GRank, i.e. stands alone.)
SYN Indicates synonym of currently recognized scientific name. (Not used in conjunction with a GRank, i.e. stands alone.)
G#T# Subspecies: numeric designations based on same criteria as those for global ranks.
G#? Uncertain: insufficient information to give a definitive ranking. Confidence of numeric rank is plus or minus one rank.
 
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State Rank
SRank: priority ranking (1 to 5) based on the number of occurrences of an element within a State.
S1 Very Rare: 1 to 5 occurrences in the State or very few individuals or acres within the state.
S2 Rare: 6 to 20 occurrences in the State or few individuals or acres within the state.
S3 Uncommon or Restricted: 21 to 50 occurrences in the State, either rather rare throughout a fairly wide range, or fairly common in a rather restricted range within the State.
S3S4 Fairly Common: 51 to 100 occurrences and found over a rather wide range within the State.
S4 Apparently Secure: more than 100 occurrences within the State, though it could be quite rare in some parts of the State.
S5 Demonstrably Secure: more than 100 occurrences within the State.
SA State Accidental: not expected to be found in the State on a predictable basis.
SB State Breeding: populations which breed and tend to be present in the state year round; generally used in conjunction with SN Rank when taxon has both migratory (non-breeding) and non-migratory (breeding) populations.
SC State Captive or Cultivated: presently extant in the state only in captivity or cultivation.
SE State Exotic: may be native elsewhere in the United States, but is an established exotic within the State; numeric designations as for state rank.
SEH State Exotic Historic: exotic within the state and not verified within the past 20 years.
SER State Exotic Reported: reported from the State, but without persuasive evidence to either accept or reject the report; if it does occur in the State it is an established exotic.
SH State Historic: historical occurrences in the state, perhaps having not been verified in the past 20 years, and suspected to be still extant.
SN State Non-breeding: usually migratory and typically non-breeding in the State; numeric designation follows "N" if occurs at definite (defensible) locality.
SP State Potential: theoretically may exist in the State, but no documentation is available to prove or disprove its existence.
SR State Reported: reported from the State, but without persuasive evidence to either accept or reject the report.
SRF State Reported Falsely: reported in error from the State and this error persists in the literature.
SU State Unrankable: unrankable at the State level.
SYN Indicates synonym of currently recognized scientific name. (Not used in conjunction with an SRank, i.e. stands alone.)
SX State Extirpated or Extinct: considered to no longer occur within Arizona.
 
Data Sensitive
DataSens: Yes/No. Indicates whether or not occurrence localities for this element are especially vulnerable to disturbance.
 
Track
Y Yes: data is being actively accumulated and entered into computerized and manual files.
W Watch: data is being passively accumulated and archived into manual files.
 
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