Copperheads are hard to see due to good camouflage and low light. Both my sister and I have been tagged by them. She was trying to catch one and it came around and got her hand....sent home from the hospital, no treatment, mildly envenomed. Said she felt like she on meth for two days. I was bitten on the thumbnail with no penetration, while holding the snake showing my kids.
So, as is said, the majority of snake bite victims in this country are "stupid people" messing with them. We grew up in the country and snakes...all snakes...were pets. I've got copperheads in the nature preserve but you have to look for them at night.