In the book Sign of the Beaver, Attean and Matt have a little treaty where Matt will teach Attean how to read, while Attean will show Matt the ways of survival, Native American style. One thing Attean teaches Matt is how to snare rabbits. This video shows what a snare is:
http://quietube.com/v.php/http://www.youtube.com/watch?v=gLRG6I8GIV0
A site that shows different kinds of snares Native Americans used, with good descriptions and pictures, can be found here:
http://www.wilderness-survival.net/food-2.php