El estado de ocurrencia describe que tan común o raro es un taxón en un área determinada. Ver DarwinCore para más información sobre terminología .

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