Francisco Piedrahita:
Green-striped Brushfinch (Arremon virenticeps)
Francisco Piedrahita:
Green-striped Brush-Finch, Green-striped Brushfinch (Buarremon virenticeps) (Arremon virenticeps)
Francisco Piedrahita:
Olive-backed Towhee, Spotted Towhee (Pipilo maculatus macronyx)
Francisco Piedrahita:
Spotted Towhee (Pipilo maculatus)
Francisco Piedrahita:
Eastern Towhee (Pipilo erythrophthalmus)
Francisco Piedrahita:
Canyon Towhee (Pipilo fuscus) (Melozone fusca)
Francisco Piedrahita:
Canyon Towhee (Pipilo fuscus)
Francisco Piedrahita:
California Towhee (Pipilo crissalis)
Francisco Piedrahita:
Yellow-shouldered Grassquit (Loxipasser anoxanthus)
Francisco Piedrahita:
Dark-eyed Junco (Junco hyemalis)
Francisco Piedrahita:
Yellow-eyed Junco (Junco phaeonotus)
Francisco Piedrahita:
Yellow-eyed Junco (Junco phaeonotus)
Francisco Piedrahita:
Yellow-thighed Finch (Pselliophorus tibialis)
Francisco Piedrahita:
Lark Bunting (Calamospiza melanocorys)
Francisco Piedrahita:
Lark Bunting (Calamospiza melanocorys)
Francisco Piedrahita:
Chestnut-collared Longspur (Calcarius ornatus)
Francisco Piedrahita:
Chestnut-collared Longspur (Calcarius ornatus)
Francisco Piedrahita:
McCown's Longspur (Calcarius mccownii)
Francisco Piedrahita:
Savannah Sparrow (Passerculus sandwichensis)
Francisco Piedrahita:
Savannah Sparrow (Passerculus sandwichensis)
Francisco Piedrahita:
Belding's Sparrow (Passerculus guttatus) (Passerculus sandwichensis guttatus)
Francisco Piedrahita:
Belding's Sparrow (Passerculus guttatus) (Passerculus sandwichensis guttatus)
Francisco Piedrahita:
Chipping Sparrow (Spizella passerina)
Francisco Piedrahita:
Chipping Sparrow (Spizella passerina)
Francisco Piedrahita:
Lark Sparrow (Chondestes grammacus)
Francisco Piedrahita:
Chipping Sparrow (Spizella passerina)
Francisco Piedrahita:
White-crowned Sparrow (Zonotrichia leucophrys)
Francisco Piedrahita:
American Tree Sparrow (Spizella arborea)
Francisco Piedrahita:
American Tree Sparrow (Spizella arborea)
Francisco Piedrahita:
Rufous-crowned Sparrow (Aimophila ruficeps)
