Plains grazers are animals that feed on the grasses and other vegetation found on plains and prairies. BISON, which is a five-letter word, is one of the most iconic examples of a plains grazer. BISON are large, hoofed mammals that are native to North America and Europe. They are herbivores and feed mainly on grasses, sedges, and forbs. BISON are also known for their impressive size and strength, and they are an important part of the cultural heritage of many Native American tribes.