I do a lot of farm work in the high mountians in Taidong county. And generally don't see any snakes in the bush. Although once I get onto the roads usually see a few a week.
Had this one keep coming out to greet me everyday for a week or two when I took the dog for a walk.
We have one of those brown ones like the picture above ( I forget the name) siting in our garden at the moment. You can hear him hissing away each night, its a very comforting sound when sleeping as he keeps the mice away.