European bison can crossbreed with American bison. This hybrid is known in Poland as a żubrobizon. The products of a German interbreeding programme were destroyed after the Second World War. This programme was related to the impulse which created the Heck cattle. The cross-bred individuals created at other zoos were eliminated from breed books by the 1950s. A Russian back-breeding programme resulted in a wild herd of hybrid animals, which presently lives in the Caucasian Biosphere Reserve (550 animals in 1999).
European bison can crossbreed with American bison. This hybrid is known in Poland as a żubrobizon. The products of a German interbreeding programme were destroyed after the Second World War This programme was related to the impulse which created the Heck cattle. The cross-bred individuals created at ot.her zoos were eliminated from breed books by the 1950s. A Russian back-breeding programme resulted in a wild herd of hybrid animals, which presently lives in the Caucasian Biosphere Reserve (550 animals in 1999).