Buffalos, also known as bison, typically have dark brown to black fur on their bodies. Their heads, including their face and hump, are often lighter in color, ranging from brown to tan. The exact shades of brown and tan can vary among individual bison. The combination of dark bodies and lighter heads is a distinctive feature of American bison. Additionally, their fur can appear shaggy and thick, especially during the winter months, providing insulation from cold temperatures.