|MadSci Network: Zoology|
A wood chuck could chuck two to eleven pounds of wood, if a woodchuck could chuck its own weight.
According to a Wall Street Journal article referenced here, Richard Thomas, a wildlife expert from New York, estimated that a woodchuck moves about 700 pounds of dirt in building its burrow...so, he estimated that over that same time and effort, a woodchuck could chuck 700 pounds of wood if a woodchuck could chuck wood.
...and, of course, there are the conventional (http://www.funtrivia.com/forums/Forum5/HTML/000157.html link defunct as of 8/22/2006) tongue twister answers...
If youi want to learn a bit more about woodchucks, also known as ground hogs (yes, they have their own day!), and also known as marmots, please feel free to check out this website.
Try the links in the MadSci Library for more information on Zoology.