Hey! What is the best way to mark/tag a snake when doing a population count? A couple of my friends and I were going to make an field herping journal this season (species, size, M/F, where, who sighted, who caught, and any abnormalities), and were wondering if there's a safe way to mark the snake without harming it so that we aren't counting the same snakes multiple times. Also is there a way to mark them where it won't come off after a couple sheds (unlike something like nail polish that I've heard that people use to mark bearded dragon clutches after they hatch).

Please let me know if you have any ideas. Thanks!