New World Sparrows:

Bachman's Sparrow
Aimophila aestivalis

Cassin's Sparrow
Aimophila cassinii

Rufous-crowned Sparrow
Aimophila ruficeps

Baird's Sparrow
Ammodramus bairdii

Henslow's Sparrow
Ammodramus henslowii

Le Conte's Sparrow
Ammodramus leconteii

Seaside Sparrow
Ammodramus maritimus

Grasshopper Sparrow
Ammodramus savannarum

Sage Sparrow
Amphispiza belli

Black-throated Sparrow
Amphispiza bilineata

Olive Sparrow
Arremonops rufivirgatus

Lark Bunting
Calamospiza melanocorys

Lapland Longspur
Calcarius lapponicus

Chestnut-collared Longspur
Calcarius ornatus

Lark Sparrow
Chondestes grammacus

Dark-eyed Junco
Junco hyemalis

Yellow-eyed Junco
Junco phaeonotus

Swamp Sparrow
Melospiza georgiana

Lincoln's Sparrow
Melospiza lincolnii

Song Sparrow
Melospiza melodia

Savannah Sparrow
Passerculus sandwichensis

Fox Sparrow
Passerella iliaca

Abert's Towhee
Pipilo aberti

Green-tailed Towhee
Pipilo chlorurus

California Towhee
Pipilo crissalis

Eastern Towhee
Pipilo erythrophthalmus

Spotted Towhee
Pipilo maculatus

Snow Bunting
Plectrophenax nivalis

Vesper Sparrow
Pooecetes gramineus

American Tree Sparrow
Spizella arborea

Black-chinned Sparrow
Spizella atrogularis

Brewer's Sparrow
Spizella breweri

Clay-colored Sparrow
Spizella pallida

Chipping Sparrow
Spizella passerina

Field Sparrow
Spizella pusilla

White-throated Sparrow
Zonotrichia albicollis

Golden-crowned Sparrow
Zonotrichia atricapilla

White-crowned Sparrow
Zonotrichia leucophrys

Saltmarsh Sharp-tailed Sparrow
Ammodramus caudacutus

McCown's Longspur
Calcarius mccownii

Smith's Longspur
Calcarius pictus

Canyon Towhee
Pipilo fuscus

Harris's Sparrow
Zonotrichia querula