The answer to one poster's question about copperheads, do "... you have to actually step on them..." before they bite? is ALMOST a yes.
But not always. I have never seen nor heard of one that was "aggressive" to the point of attacking and everyone who has been bitten that I am aware of was in very close proximity to the snake so ALMOST stepping or sitting or touching it before being bitten.
OTOH, I very much disagree with the poster who says "A snake won't bite unprovoked."
Well, maybe that IS strictly true, since I have seen Water Mocs attack for no reason I could discern except I was in the general area. (So, I guess they were provoked about that).
Mocs will come at you, will try to strike you and often strike more than once even if their victim is bitten on the first strike.
Rattlesnakes are sometimes unpredictable-a kid was just bitten near a ball field when he reached down to pick up a ball by a Pygmy Rattler (which he didn't see). But, usually, they try to get away.
But, once in a while-they will just lay there and, if you get too close-OOOPS!
Coral snakes are really rarely seen here in Florida, though a lot of other snakes, thought to be Corals, are butchered. They pose little danger unless they can get their little itty bitty mouths on your finger (a child's) or between them in the web of your fingers or thumb. They are very shy.
I recall only seeing three in the wild. And, I misspent much of my youth and early adult life in and around the woods and swamps of Florida. The ones I saw were in residential areas, in/around old sheds.
But, Mocs, well, if I never see another that will suit me fine. They are the only snakes that I am really afraid of.
That nasty, white mouth, if you see it, is a sure sign you are in for some serious trouble. I recommend a shotgun!
But, I have several non-poisonous snakes in or near my yard and I just let them alone. They have a good purpose in ridding the neighborhood of rats and other vermin.
Bob