In my last post I asked the boys, "What lives in a waterfall?" Well, something does love to live on the very edge of waterfall's rock ledges. Aquatic insects have staked out their claim at the very edge of the falls.
Consider too, the incredible abilities of these aquatic insects, living there in that constant, rushing current.
For one thing, they don't get a break. If they let go... well, you get the picture.
waterfall-dwelling aquatic insects.
See also What Lives In A Waterfall? (part 1)
Part III of What lives in a waterfall?
You might enjoy taking your own underwater photos with an underwater digital camera... here's the one I used.