I have a fountain/stone birdbath in my backyard that has a bubbler that cascades water continuously. The local birds of all sizes love to bath in it. I've noticed what looks like very small leeches (1 inch in length, 1/16 inch in breadth) clinging to the wet stone sides of the fountain in great numbers. I imagine they came from the birds. Is this common? I let the bath dry out for a week and all the leeches (?) disappeared. After turning on the fountain again, they are back. I am wondering if these can be damaging to the birds, and if so, what steps I should take to rid the bath of them?
I don't want to use something that will be toxic to the birds.
I don't want to use something that will be toxic to the birds.