Someone asked the question about how do fish get into pond that are not stocked by the owner. I am wondering how do snakes get into ponds. I don't believe snakes leave one body of water and crawl significant distances across land search for that new pond to explore. But in the south if you dig a pond, which are usually for watering cows or some agricultural related use, sooner or later you will have cottonmouths appear. How do they get there?