The kanji for buffalo (水牛) is correct, but the image you use is that of a North American Bison (バイソン属). The term 水牛 applies only to the Asian buffalo, e.g. water buffalo.
Also, under cooking you translate grater as 卸し器, but the kanji is wrong. That translate as wholesale. It should be おろし器 with no kanki for おろし.