I was reading about this technique today. Biologists use it to determine the number of animals in a certain area. I found 4 three-toed box turtles yesterday all together--one female and three males. Yes, it must be breeding season!! I thought about marking them to indicate they had been caught once in case I see them again, or in case anyone captures them, they will know that they are being tracked and maybe leave them alone. What's your thoughts about this?