Carrion crows and hooded crows are almost indistinguishable genetically, and hybrid offspring are fertile. Biologists now show that the two forms have remained distinct largely owing to the dominant role of plumage color in mate choice.
Carrion crows and hooded crows are almost indistinguishable genetically, and hybrid offspring are fertile. Biologists now show that the two forms have remained distinct largely owing to the dominant role of plumage color in mate choice.