PhilaSilva:
Ring-necked Duck on Mall
PhilaSilva:
Duck yoga
PhilaSilva:
Mallard drake in constructed wetland in front of Main Interior Building in DC
PhilaSilva:
Duck of the Interior
PhilaSilva:
Eastern Tiger Swallowtail?
PhilaSilva:
Great Spangled Fritillary?
PhilaSilva:
bivalves in Rock Creek
PhilaSilva:
Mallard by DOI
PhilaSilva:
Life persists in winter