Martinlf on Mar 25, 2007March 25th, 2007, 4:11 am EDT
The entomologists here will know more about what it eats, but I believe dragonfly nymphs are carnivorous, and eat other water creatures. To see what it will turn into, use the Google search function at http://www.google.com and search dragonfly insect. I believe you will get pictures of the adult.
"He spread them a yard and a half. 'And every one that got away is this big.'"