While talking about moccasins, you show a different species. How do you know it actually was a moccasin? On top of this, most dangerous is broad, the most bites come from moccasins, but the deadliest is the eastern diamondback.
It's not rocket science, folks. Keep your grass cut short, and keep your yard as free as possible of things that snakes can get under. That's about all you can do. Watch where you step and watch where you put your hands.
