south dakota, as well as other preserves. about 50 are here now and can move freely around these 1,500 acres. this is pretty close, isn't it? this is unusually close. >> reporter: bison are much easier than cattle for this job. they don't need a barn, don't need to be fed, are hardy as all get out, needing only one medical exam every year. the hope is to have a herd of 125 in the future. >> when you look at a bison it conjures america. >> reporter: it does. >> they're just iconic americana. >> reporter: so give me a home where the buffalo roam, just two hours west of chicago. dean reynolds, cbs news, franklin grove, illinois. >> pelley: and that's the "cbs evening news" for tonight. for all of us at cbs news all around the world, good night. captioning sponsored by cbs captioned by media access group at wgbh