Spilling Thought: Judging from this picture, even for the #wildlife, Philly can be a tough town. Over 1.7 million people live within 10 miles of John Heinz National #WildlifeRefuge. Established to preserve Tinicum Marsh in #Philadelphia, it is America’s first urban refuge. Surrounded by the cityscape, the refuge is a thriving sanctuary teeming with a rich diversity of fish, wildlife and plants native to the Delaware Estuary. Healthy and productive expanses of freshwater tidal marsh, open waters, mudflats and woodlands support the hundreds of species that breed, rear their young, rest during migration or call the refuge home year-round. Photo by Frank Miles, @USFWS. by usinterior