Nature Photography: Ducks at a pond

I took this photo at tech park of the ducks by a stream near by the man built pond.  I edited the image using both picnik and gimp.  I used picnik to get the clear black and white effect then gimp to add a rainbow gradient to the water.  As you can tell from this photo and the color flowers one I posted a while back ago, when it comes to photoshop and gimp, I love to add gradients to my photography sometimes.