anas platyrhynchos
anas platyrhynchos platyrhynchos
anatidae
bill
bird
bird watcher
bird watching
birder
birding
birds
common mallard
creek
drake
feather
mallard anas platyrhynchos
mallard duck
migration
migrator
migratory
north america
ornithology
pennsylvania
philadelphia
river
united states
waterfowl
wildlife photography
winter
winter time
wintertime