but as they are distinguished from each other by a greater amount of difference than that between the local forms and sub-species, they are almost universally ranked by naturalists as true species.
baina, elkarren artean forma lokalen eta azpiespezieen artean dagoena baino diferentzia handiagoaz bereizten direnez, naturalistek, ia unibertsalki, benetako espezietzat sailkatzen dituzte.