Our waters and their wildlife have changed dramatically over the last century. Many species disappeared due to pollution, and the expansion of the waterway network introduced new, often unwanted species. However, many species thought to be extinct have been able to recover thanks to advanced environmental protection efforts. This book describes over 280 native species of invertebrates in words and images that live in garden ponds, puddles, lakes, streams, brooks, or rivers. It not only lists the commonly occurring species but also provides detailed descriptions of rare, particularly interesting, often overlooked, or newly arrived species.