NSL Photo of the Week

Each week we will add a new photo for your viewing pleasure.

Tree Swallow feeding young at John Heinz National Wildlife Refuge at Tinicum

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Tree Swallow feeding young at John Heinz National Wildlife Refuge at Tinicum

John Heinz Wildlife Refuge Tinicum animals animal beast beasts creature creatures zoology undomesticated animals amphibian frog birds avain aves environment ecology ecosystem environmentalism scenery nature landscape land park national park wetlands b Heinz 2011 0363b copyright

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