Seatuck National Wildlife Refuge is a 196-acre refuge in Islip on Long Island’s south shore, along Champlin Creek beside Great South Bay and separated from the Atlantic by Fire Island. Managed by the U.S. Fish and Wildlife Service within the Long Island National Wildlife Refuge Complex, it preserves an important pocket of coastal habitat in a heavily developed area. About half the refuge is tidal marsh, which supports many wintering waterfowl and helps sustain migratory birds. It is known for waterbirds, songbirds, raptors, white-tailed deer, and red fox, with management centered on protecting forests and grasslands, restoring wetlands and habitat, and maintaining nesting structures.