What I don't' understand is..With the thousands of tadpoles (at least 4 varieties and probably 10's of thousands) in my pond every spring...I should be shoveling the emerging hoppers like a 10" snow, but I don't see near as many as I would expect. They are there, just not in numbers that closely represents the numbers of tadpoles. I would think you could see the exodus from space...lol. The fresh hoppers must be forage for many land critters as the tadpoles don't seem to be tasty.