We live on the shore of Kentucky Lake in Middle Tennessee and kayak often. A common snake here is the Northern watersnake. Observing several of these snakes over a period of ten years, I am puzzled by their behaviour in several respects.
The snakes appear in March when it's still cold, much earlier than other snakes. They repeatedly return to the dock or the pontoon boat even after being forcibly removed. The other snakes here are shy and usually don't return once frightened away. This year, twice, Northern watersnakes have followed my kayak. They change course towards me and speed up to keep up.
My basic question is, Why would a snake follow a kayak?