The Silver Swan is an automaton built in 1773. Now housed at the Bowes Museum, it finds and eats a fish every day at noon and 3PM.
The swan is life-size and is controlled by three separate clockwork mechanisms. The Silver Swan rests on a stream made of twisted glass rods interspersed with silver fish. When the mechanism is wound up, the glass rods rotate, the music begins, and the Swan twists its head to the left and right and appears to preen its back. It then appears to sight a fish in the water below and bends down to catch it, which it then swallows as the music stops and it resumes its upright position. This performance lasts approximately 40 seconds.
I wonder if the robots being built now will still work in 235 years. Link -via Metafilter