Bombay Hook National Wildlife Refuge in Delaware was established in 1937 as a link in a chain of refuges extending from Canada to the Gulf of Mexico. The refuge protects one of the largest remaining tidal salt marshes in the region, which serves as a vital feeding and resting place for migratory birds. Wildlife can be seen year round at Bombay Hook, but spring and fall offer the best opportunity to observe large numbers of waterfowl and shorebirds. Photo by Tim Williams, U.S. Fish and Wildlife Service.