Justin Miller of Blackforestclocks.org sent this video along. This musical clock was made in the Black Forest region around 1770. The piece features a blackbird automaton. The movement plays 5 different birdsong-themed songs at the top of the hour, while the blackbird figure moves from left to right and opens and closes its beak as if singing the tune.
For more information on this type of clock, you will want to check out Miller's outstanding book Rare and Unusual Black Forest Clocks. Among the most comprehensive volumes ever produced on the subject, this large format book features over 700 images showcasing the finest examples of clocks made in the Black Forest region.