Why don't Slavic and Baltic languages use their words for the European bison to refer to North American bison?
It frustrates me that virtually all major European languages (that I am aware of) call the North American bison some variation of "bison", and none of them use the word for the European bison for the American ones - i.e. by referring to Bison bison as "American Bison bonasus". (Apparently Greek does, but only because "bison" originally came from Greek.) TBF, "bison" originally referred to the European bison if you go back far enough.
The English/western European colonists and scientific writers at least had an excuse to call the North American animals "bison", taking the word from ancient Greek/Latin sources, since European bison had been extinct in western Europe for centuries to millennia by that point.
But Slavic/Baltic Europe (except maybe South Slavic) have coexisted with the European bison almost continuously, for goodness's sake! I know European bison became extinct in the wild, but this was in the late 19th/early 20th century, long after knowledge of North American bison had reached eastern Europe. Couldn't they have noticed the American animals the western zoologists/writers were writing about were very similar to the local ones? Why isn't the North American bison żubr amerykański in Polish (or cognates thereof in other Slavic languages)? Why is it not Amerikos stumbras in Lithuanian?