… We also have a growing marine program, which is improving our understanding of the very valuable and fragile habitats off our coast, and working with local restaurants to restore wild oyster reefs in Ninigret Pond. The Conservancy offers guided walks on its preserves, both on the mainland and Block Island.  The walks are typically 2 miles long, and are organized around seasonal themes, such as vernal pools, birdwatching, fall foliage, etc.  Occasionally, we will offer a longer hike at a preserve …