Welcome to Derwent Reservoir and Pow Hill Country Park! This leaflet is one of a number of ways in which you can find out about the wildlife and history of Derwent Reservoir and Pow Hill Country Park. The heathland around the reservoir is a haven for reptiles like Adders, Slow Worms and Common Lizards. The reservoir is also important to many species of birds which use it as a migratory stop over and breeding site.