text: Experts recognize 17 to 19 subspecies which vary in appearance and range ; there is disagreement over whether the distinctive Barbary Falcon is a subspecies or a distinct species .
simplified: There are 17 â `` 19 subspecies recorded , and each varies slightly in appearance and where they live . There is disagreement over whether the distinctive Barbary Falcon is a subspecies of the Peregrine or just a different species .