My tip is more for the safety of the critters, and I only say this because I have killed two snakes this way and it was avoidable.

when flipping over debris, Logs, boards or whatever, after you have taken your photos, reach down and spook the animal away before you return the item back to it's original location.

Last summer I flipped over a board and found a young garter snake, when I returned the board to where it was the snake had gotten pinned in place by the board and perished. I found the poor things corpse the next time I flipped the board.

Happened again this spring, only this time the weight of the board squished the poor little snake.

So like I said, always move the snake out of the way before returning the hiding place to it's original state.