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)