In the few years I've been growing fish outdoors I've had Great Blue Herons, green Herons, kingfishers, muskrats, beavers, and terrestrial crayfish digging holes all over the place including my dikes. No commorants yet or otters, but I'm sure they are coming. My state is happily reintroducing otters so it's just a matter of time.
Not blaming anything on the wild animals as they were here long before I was, and are just doing what comes natural, which is seeking out food and surviving. But it sure is a challenge at times to keep a good density of fish from being eaten or your ponds wrecked!
Edited by az9, 04 May 2009 - 10:08 PM.