Possible Clues:

• Wild ox of the prairies
• Nickel beast
• It's big-headed, with a hump? You're seeing double, child!
• Manitoba coat of arms feature
• Go for cover in no uncertain way
• Plains Indian mainstay
• Kind of shaggy cattle
• My boy, buy some thing big and beastly
• Animal on the backs of three state quarters
• Badlands animal