Occurence status describes how common or rare a taxon is in a given area. See DarwinCore for more information on terminology.

present

Occurs in the area

common

Occurs frequently

uncommon

Occurs regularly, but in small numbers; requires careful searching of proper habitat

irregular

Presence unpredictable, including vagrants; may be common in some years and absent others

doubtful

Presumed to occur, but doubt exists over the evidence

absent

Does not occur in the area