I've started working on a WOLF project. In late May 2011 I went out to Yellowstone National Park and took a workshop called "Behind the Scenes of Wolf Management."

Here's an audio clip of our instructor Jon Trapp doing a wolf howl (it's very specific, and - how about this: it's illegal to howl in a national park - so Jon was howling behind closed doors).

Howl

WOLF BIBLIOGRAPHY (this is just a start)

Lopez, Barry. Of Wolves and Men. New York: Charles Scribner's Sons, 1978.

Mech, L. David and Boitani, Luigi. Wolves: Behavior, Ecology, and Conservation. Chicago and London: The University of Chicago Press, 2003.

Nie, Martin. Beyond Wolves: The Politics of Wolf Recovery and Management. Minneapolis and London: University of Minnesota Press, 2003.

Smith, Douglas W. and Ferguson, Gary. Decade of the Wolf: Returning the Wild to Yellowstone. Guilford, CT: The Lyons Press, 2005.

LINKS TO WOLF ORGANIZATIONS AND INFO

The International Wolf Center - http://www.wolf.org/
The Wildlife News: Wolves - http://www.thewildlifenews.com/category/wolves/
Yellowstone Association: The Institute - http://www.yellowstoneassociation.org/institute/
Yellowstone Wolf Tracker - http://wolftracker.com/
The Wolf Education and Research Center - http://www.wolfcenter.org/
More links here.