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Although superficially similar, a number of physical and behavioural differences are seen between the European bison and the American bison. The zubr has 14 pairs of ribs, while the American bison has 15. Adult European bison are (on average) taller than American bison, and have longer legs. European bison tend to browse more, and graze less than their American relatives, due to their necks being set differently. Compared to the American bison, the nose of the European bison is set further forward than the forehead when the neck is in a neutral position.