YELLOWSTONE NATIONAL PARK
'(<a href="http://www.j-archive.com/media/2004-10-19_J_27.jpg" target="_blank">All four Clue Crew members listen to an animal howl as they sit around the campfire at dusk in Yellowstone National Park. Sarah reads.</a>)  You can hear the call of this animal which was re-introduced to Yellowstone in the 1990s'
a wolf