The Eastern Road Nature Reserve, off Lewes Road, is a reserve alongside the Scrase Stream, which provides a wetland habitat for birds, butterflies and insects. It is situated on the site of a former sewage treatment plant, and has been allowed to develop since the plant closed in 1975. The diverse vegetation supports populations of insects and butterflies, which together with autumn fruits, attract visiting birds such as warblers, finches and siskins. Frogs, newts, dragonflies and other aquatic insects occupy the wetland areas.