I stumbled across a blog post by Samuel Monnier at Algorithmic Worlds recently that discusses Ducks Fractals. Samuel was also kind enough to share the algorithm and formulas so anyone can have a go at implementing them.
Here are a few of my results using the ducks algorithm.
To see the above images and more in their original high res versions see my flickr gallery.
Here is a quick test zoom movie into a Ducks Fractal.
Ducks Fractals are now included in Visions Of Chaos.