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Elk , moose , mule deer , bighorn sheep , bison , coyote , marmot , pronghorn , and cougar are but a few of the 75 species of mammals known to exist in the forest .
 Elk, moose, mule deer, bighorn sheep, marmot, pronghorn
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: media, plant, vehicle, astronomical object, time, disease, animal, location, person, organization, mythical figure, food, biology, geographical phenomenon, instrument, event 
Text: {0} 
Answer:
 Elk, moose, mule deer, bighorn sheep, marmot, pronghorn