The paramount importance of these considerations in explaining the immense amount of variation which pigeons have undergone, will likewise be obvious when we treat of selection.
Usoek jasan duten aldakuntza piloa azaltzeko erabili ditugun gogoramenon garrantzi handia argi geratuko da Hautespena aztertzen dugunean ere. Orduan, arraza ezberdinek nolabaiteko munstro-izaera daukatela ere ikusiko dugu.