This engaging title tells the story of two different ecosystems--the declining fish population in the Claymount Stream and the declining number of birds in the Mainsville Woods. These stories show prime examples of predicting causes, collecting data, and making conclusions and problem-solving solutions. Not only will children practice collecting data and making predictions, but they will also learn about ecology and STEM themes. The interesting stories, vivid images, easy-to-read text, clear mathematical charts and diagrams, and accessible glossary will keep readers engaged and confident that they can learn to analyze data to solve these problems and many others!