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