West Nile has just reached my town, so far just the birds. We have a bird bath that is usually very stagnant, the perfect spot for mosquito larvae. My question is, is there a good utric that could survive in a bird bath. I have a U. Subulata and I think my climate isn't an issue. The most important issue is water, can utrics survive in tap water? Also trap size, mosquito larvae are probably a bit too large for most utrics. And finally growing space, it would need to be an aquatic, but the bird bath is an average sized bird bath. From The SG I found U. humboldtii.