DaveW,
Since you notice water snakes and since you, as an artist, have a keen eye for detail, keep an eye out for a different water snake; it is the Queen snake. They don’t look at all like our common Northern water snake, are docile, and can be an indicator of fair water quality.They feed exclusively on crayfish and something in the back of my mind says soft-shelled, recently molted crayfish. Their distribution is quite limited in Pa. From a practical standpoint, they are pretty restricted to a few south central counties. I saw them three times in York Co, twice on the same stream about 35 yrs apart and once on another. Both streams had low to sub-moderate density wild BT populations. Bryan Chikotas also spotted one recently in his adjacent region. These critters are docile but easily frightened and often drop from tree or shrub branches hanging 3 ft or less over the water. So you may spot one as you fish in an upstream direction. I always considered it to be a privilege when I saw one close up in the field.