Mallard/domestic duck cross (Anas platyrhynchos platyrhynchos X domesticus) School House Pond, Upper Marlboro, MD
all nature photosbirdswaterbirdsducks and geesePrince Georges CoMaryland
From Mid-Atlantic Birds
Mallard/domestic duck cross (Anas platyrhynchos platyrhynchos X domesticus) School House Pond, Upper Marlboro, MD
all nature photosbirdswaterbirdsducks and geesePrince Georges CoMaryland
From Mid-Atlantic Birds
![Mute swan (<i>Cygnus olor</i>) <span class="nonNative">[Non-native, invasive]</span>
City Park Lake, Hagerstown, MD](https://photos.smugmug.com/Photo-Galleries/All-Geographic-Areas/All-Birds-1/i-jtDpgC2/2/1df48dd0/Ti/2009_DSCN1072-Ti.jpg)
