Check out this nicely made automaton by Karen Barkie featuring two swans. I love the clean construction and the clever, yet simple way she incorporated a hand-cranked music box.
From the video description: A wooden automaton. Male Mute swan swims protectively around a nesting female to the music of Fur Elise played on a small music box. The wooden circular top spins around the stationary female. This is accomplished by inserting a 1/2" dowel within a 1 1/4" dowel. Made of oak, poplar and basswood. Measures 13 1/2" tall and 8" deep and wide. By Karen Barkie.
Here is where you can see more videos of automata by Karen Barkie.
[ Thanks Christoph! ]