Nature might be taking care of Santa Cruz, California's red-eared slider turtle (Trachemys scripta elegans, formerly genus Chrysemys - thanks Sven!) problem. According to this article at the Santa Cruz Sentinel, park officials from Natural Bridges State Beach have noticed that local raccoons are snatching up the non-native turtles for dinner, and the officials aren't exactly upset about it. The red-eared sliders, most likely released by unthinking pet owners, are thought to compete with rare Western pond turtles (Clemmys marmorata) for food, and have been observed eating the legs off local frogs.
Tip of the virtual hat to the Protect Your Waters website. Negative bonus points to the Sentinel for running a big 'ol ad for TurtleSale.com right smack in the center of the article!