Dusty,
Don't worry about ducks or geese, or even the occasional heron, but keep an eye out for the Cormorants...aka water turkeys. If you are on their flyway, they will find your pond and are very capable of completely cleaning you out of 4 to 6 inch fish. Once one scout bird finds you, then others quickly follow. They have been terrible in East Texas for me this year...maybe you aren't on their route, but keep an eye out for them. The migration back north should start in a couple of weeks or less and once they migrate out, no worry until the next fall.
