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Tree Swallow feeding young at John Heinz National Wildlife Refuge at Tinicum
John HeinzWildlifeRefugeTinicumanimalsanimalbeastbeastscreaturecreatureszoologyundomesticated animalsamphibianfrogbirdsavainavesenvironmentecologyecosystemenvironmentalismscenerynaturelandscapelandparknational parkwetlandsbHeinz20110363bcopyright
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