First Beaver Seen in Detroit River in 75 years

"A single beaver lodge has been discovered in an intake canal at Detroit Edison's Conners Creek power plant on Detroit's east riverfront. Edison workers using motion-sensitive cameras caught photographs and video of the beaver in November.

"John Hartig, the Detroit River refuge manager for the U.S. Fish and Wildlife Service, said beavers were last spotted in the Detroit River at least 75 years ago, possibly as long ago as a century. Their return signals that a multiyear effort to clean up the river has paid off."

The actual headline from the Detroit Free Press was "Leave it to beaver to prove river cleaner", but the jokes come easier the way I phrased it.