Answer
Bison horns curve inward and point at each other. Buffalo horns curve outward.
- Bull bison horns NEVER point towards each other, only the cow (female) ones do. The words buffalo and Bison (which both literaly translate to "Ox like animal") can both refer to the American Plains Bison (Bison bison bison) and the American Woods Bison (Bison bison athabascae- which is larger). Both species have similar horns. Water buffalo horns are much different.