Bushtit Mexican Mallard Curve-Billed Thrasher Black-Throated Sparrow Vermillion Flycatcher Anna's Hummingbird Ladder-Backed Woodpecker Gila Woodpecker Gila Woodpecker Gila Woodpecker Yellow-Rumped Warbler Female Great-Tailed Grackle Vermillion Flycatcher Brown Chinese Goose Northern Shoveler with Funky Shovel Juvenile Dark-Morph Snow Goose Ruddy Duck Ross's Goose Ross's Goose Snow Goose Brown-Capped Rosy-Finch Brown-Capped Rosy-Finch Brown-Capped Rosy-Finch Phainopepla Bewick's Wren A Mountain of Sandhills Eastern Phoebe Harris's Sparrow Gambel's Quail Ross's Goose Sandhill Crane Bosque del Apache National Wildlife Refuge Mexican Mallard x Northern Mallard Hybrid Washington's Headquarters Washington's Headquarters George Washington Valley Forge Station Cannon at Valley Forge Bunks in the winter cabins Winter Huts at ValleyForge Juvenile Northern Mockingbird Underground Visitor Center Fade to Purple Valley Forge National Historical Park Bison