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An American Bison stands in a field of grasses in Yellowstone Nationa Park, Wyoming. The bison is meant to represent the success of the conservation efforts of several organizations - Yellowstone National Park included - to save the animal from near extinction from overhunting. The bird on the bison's back is not only a play on words as the 'Bullrider,' but also as a reminder that the two have a symbiotic relationship, as the bird feeds on insects on the bison's hide, while the bison is temporarily relieved of the annoying insects.
