Do wolves really howl at the moon?

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What's the difference: cheetah or leopard?

What's the difference: cheetah or leopard?

Both are spotted and swifty, but leopards and cheetahs have some major differences. Let us know if you can tell them apart at HowStuffWorks.

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  • Busch, Robert A. "The Wolf Almanac: A Celebration of Wolves and Their World." Globe Pequot. 2007. (July 14, 2008)
  • Cashford, Jules. "The Moon: Myth and Image." Thunder's Mouth Press. 2003. (July 15, 2008)
  • Feldhamer, George A.; Thompson, Bruce Carlyle and Chapman, Joseph A. "Wild Mammals of North America: Biology, Management and Conservation." JHU Press. 2003. (July 14, 2008)
  • Harrington, Fred H. "What's in a Howl?" PBS Nova. Updated November 2000. (July 14, 2008)
  • Henes, Donna. "The Moon Watcher's Companion." Marlowe & Company. 2004. (July 15, 2008)
  • "Howls and Growls: Vocal Communication in Wolves." Earth Expeditions. (July 14, 2008)
  • Lopez, Barry Holstun and Bauguess, John. "Of Wolves and Men." Simon and Schuster. 2004. (July 14, 2008)
  • Musgrave, Ruth A. "Wolf Speak." National Geographic Kids. February 2007.
  • Rosenberg, Donna. "World Mythology: An Anthology of the Great Myths and Epics." McGraw-Hill Professional. 1994. (July 16, 2008)