Works great for geese for me. I found they work best when you give them a lot of slack on the anchor line. 6' of water, 20' of line. This way the they move quite a bit on their own. But even then the GBH did get use to them over time. Once a snapper go tangled in the line and dragged it around my 2 acre pond for a couple days. That kept everything away. I'm in Central NC where there are no gators, and I even did a double take when I saw it "swimming" across the pond the first time.