Posted: 06/05/2013 at 14:58
Yes, you will attract wildlife. Frogs and toads travel long distances. Dragonflies and newts too. Just leave the pond be and things will come. The birds will bring things in on their feet, too.
But if you leave that watercress in there you'll never see them through the foliage, and one of the joys of a pond is watching what's going on in the water.