I have not seen frogs or toads near the stream. However, last year we had more tree frogs (green ones and gray ones) than I have ever seen before. I don't know if that was a fluke or if they established critical mass. They frequently appeared on the sides of the house and the door, not far from the stream. We've had the stream for a while, but it may have contributed to the increase. We have always had a lot of common toads.