These are some really mean (but non-venomous) snakes, I had a larger one attack me that morning, luckily I was wearing my snake protectors, because even though they aren't going to kill you, they can make a really bad infection should you get bitten. The one that attacked me was solid brown, larger, and meaner, he was striking anything at all that swam or went by him. They are SUPER territorial. Later I returned to this area walking through over knee-high grass and felt a HEAVY thumping feeling on my shin, I looked down and that snake had wrapped itself around my ankle and was repeatedly striking my plastic snake guards. It was actually pretty cool to feel and witness, startling, but cool! I hope that his teeth were O.K., I didn't plan on hurting one.
I have a pair of knee-high snake boots now too, and a pair of snake protectors that are fabric with plastic inserts, I NEVER go in any tall grass or snakey places without them!
This one was 'probably' around 4 to 4-1/2 feet long, it's kind of hard to tell when they are all coiled up on a log, but he was really big. There were maybe 6 of these large snakes in one small pond, they hung or laid in the trees right next to you if you weren't careful.