Book excerpt: You might walk right by a vernal pool and not notice it. Often mistaken for mere puddles in the woods, vernal pools are the source of life for many interesting creatures. These secret pools form every year when low places on the forest floor fill up with rain and melted snow. They soon become home to hatching wood frogs, spotted salamanders, and fairy shrimp. Even in late summer and fall, creatures such as turtles and snakes rely on these places for shelter and food.