Bison, not buffalo.
Africa and SE Asia have buffalo. In North America we have bison.
Also, not to be that guy, but even if it were "buffalo", the use of the apostrophe is incorrect. You intended to show the plural of buffalo by using buffalo's, but an apostrophe denotes either possession: "Your momma has a buffalo's face", which is like saying she possesses the face of a buffalo; or the apostrophe can be a contraction of two words, i.e., "it's" as a contraction for "it is", such as "It is true, your momma has the face of a buffalo".
Carry on.