Is that a big river? One frosty dawn in Montana I watched a herd of big bulls walk down to a big river and swim it. They never broke pace and seemed to swim and walk at the same speed. Came out the other side with steam billowing off of them.
I think the Hudson is about half a mile wide or more at the point. It’s tidal as well. Ocean going vessels pass where those bison crossed en route to Albany and Troy. It’s a big river.