The Fly Catching LED Clock is the work of British designers Jimmy Loizeau and James Auger, the clock collects insects on a sticky roller which is covered in fly paper, the dead flies are then dropped into a microbial fuel cell.
The dead flies are then digested by bacteria, and the chemical changes are used by the microbial fuel cell to power the LED clock, it certainly sounds very interesting, who knew flies could be so useful.
Dvice via Slippery Brick, TecChee