The Grand Canyon rattlesnake (C. oreganus abyssus) is a subspecies of the more broadly spread Western rattlesnake (Crotalus oreganus).
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Mountain lions (Puma concolor) are the largest predators found in the Grand Canyon. There are 18 native South American, 25 native North American, and 40 English names for this species, and the most common are puma, cougar, panther, and catamount.
Mule deer (Odocoileus hemionus) are very common throughout western North America, and are one of the most commonly seen animals in Grand Canyon National Park.