It interbreeds regularly and extensively with the mallard, to which it is closely related. The chukar readily interbreeds with the red-legged partridge and rock partridge. There it interbreeds with the local species "C. cyatheoides", with the resultant hybrid offspring sterile. It interbreeds with several other species found in its range. This bird interbreeds with the collared towhee where their ranges overlap in southwestern Mexico.