YellowstoneNPS:
Yellow-headed blackbird (Xanthocephalus xanthocephalus) near Floating Island Lake
YellowstoneNPS:
Blue-winged teal (Spatula discors) on Alum Creek
YellowstoneNPS:
Barrow's goldeneye (Bucephala islandica) on Yellowstone Lake (2)
YellowstoneNPS:
Barrow's goldeneye (Bucephala islandica) on Yellowstone Lake
YellowstoneNPS:
Bufflehead (Bucephala albeola) near Yellowstone Lake
YellowstoneNPS:
Common merganser (Mergus merganser) near Yellowstone Lake
YellowstoneNPS:
Common merganser (Mergus merganser) pair near Yellowstone Lake
YellowstoneNPS:
Northern rough-winged swallow (Stelgidopteryx serripennis) perched in a tree
YellowstoneNPS:
Rock wren (Salpinctes obsoletus) perched on a boulder
YellowstoneNPS:
Song sparrow (Melospiza melodia) perched on a reed
YellowstoneNPS:
Red-winged blackbird (Agelaius phoeniceus) calling from a tree
YellowstoneNPS:
Yellow warbler (Setophaga petechia) perched in a tree
YellowstoneNPS:
Northern rough-winged swallow (Stelgidopteryx serripennis) perched on a snag
YellowstoneNPS:
Lazuli bunting (Passerina amoena) perched in a sagebrush bush
YellowstoneNPS:
Chipping sparrow (Spizella passerina) perched on a snag
YellowstoneNPS:
Mountain bludbird (Sialia currucoides) perched on a snag
YellowstoneNPS:
Violet-green swallow (Tachycineta thalassina) preening on a branch
YellowstoneNPS:
Black-capped chickadee (Poecile atricapillus) calling in Mammoth Campground
YellowstoneNPS:
American robin (Turdus migratorius) on a sagebrush bush
YellowstoneNPS:
Black-capped chickadee (Poecile atricapillus) in Lower Mammoth
YellowstoneNPS:
House wren (Troglodytes aedon) calling in Mammoth Campground
YellowstoneNPS:
House wren (Troglodytes aedon) in Mammoth Campground
YellowstoneNPS:
House wren (Troglodytes aedon) calling in Mammoth Campground (2)
YellowstoneNPS:
Pine siskin (Spinus pinus) in Mammoth Campground
YellowstoneNPS:
Mountain chickadee (Poecile gambeli) in Lower Mammoth
YellowstoneNPS:
Common starling (Sturnus vulgaris) calling from a tree
YellowstoneNPS:
Vesper sparrow (Pooecetes gramineus) on a rock
YellowstoneNPS:
Lark sparrow (Chondestes grammacus) on a rock
YellowstoneNPS:
Broad-tailed hummingbird (Selasphorus platycercus) in flight (2)
YellowstoneNPS:
Broad-tailed hummingbird (Selasphorus platycercus) in flight
