I bisonti potrebbero ricomparire nelle foreste in Svizzera, dove vivevano molti anni fa. Alcuni progetti in questa direzione sono portati avanti da fautori che sottolineano come il grande animale farebbe meno danni di predatori quali lupi e orsi. Fra i sostenitori vi è lo zoologo Christian Stauffer, secondo cui l’arco giurassiano si presterebbe alla locazione del bovino.
Il bison bonasus (bisonte europeo) è il più grande animale rimasto in Europa pur essendo più piccolo di quello americano: misura 3 metri di lunghezza per circa 2 metri di altezza. Pesa fino a 900 chilogrammi. Fu cacciato e abbattuto per le carni. In Polonia l’ultimo esemplare mori nel 1921.
Ne rimasero negli zoo poche decine nell’Europa orientale. Grazie a un programma di ripopolamento, in Polonia e Bielorussia attualmente vi sono circa 800 esemplari in cattività. Il reinserimento di mandrie di bisonti è legato a esigenze di conservazione della specie, ma anche alla volontà di incrementare il turismo rurale.
RG/mas
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