Yolo Bypass Wildlife Area, California

White-crowned Sparrow (Zonotrichia leucophrys)

Lesser Scaup (Aythya affinis)

American Pipit (Anthus rubescens)

Horned Lark (Eremophila alpestris)

Rodeo Lagoon, Marin Headlands, California

Western Bluebird (Sialia mexicana)

Hermit Thrush (Catharus guttatus)

White-crowned Sparrow (Zonotrichia leucophrys)

Hooded Merganser (Lophodytes cucullatus)

Arden Park, California

Yellow-rumped Warbler (Setophaga coronata)

Orange-crowned Warbler (Oreothlypis celata)

Red-tailed Hawk (Buteo jamaicensis)

Colusa NWR, California

Falcated Duck (Anas falcata)

Green-winged Teal (American) (Anas crecca carolinensis)

Northern Pintail (Anas acuta)

Black-necked Stilt (Himantopus mexicanus)

Yolo Bypass Wildlife Area, California

Marsh Wren (Cistothorus palustris)

Red-shouldered Hawk (Buteo lineatus)

Serene Lakes, California

Mountain Chickadee (Poecile gambeli)

Steller's Jay (Cyanocitta stelleri)

Nimbus Fish Hatchery, California

Common Goldeneye (left) and Barrow's Goldeneye (right) (Bucephala clangula and Bucephala islandica)

Not the best photo but it clearly illustrates the field marks/differences of these often confused species. Note the shape of the face spot (elongated in the Barrow's), the amount of black on the back (Barrow's has more black), and the sheen color of the head (Barrow's is commonly purple instead of green for the Common)