Sunset sparkles off ice and water at Parker River National Wildlife Refuge. Not far from Boston, Massachusetts, Parker River National Wildlife Refuge covers 4700 acres of salt marsh, shrub land and sandy beach. There are over 300 species of resident and migratory birds to watch, as well as a large variety of mammals, reptiles and amphibians. Photo by Sylvia Zarco. Posted on Tumblr by the US Department of the Interior, 1/4/16.