Francisco Piedrahita:
White-throated Sparrow (Zonotrichia albicollis)
Francisco Piedrahita:
White-crowned Sparrow (Zonotrichia leucophrys)
Francisco Piedrahita:
White-crowned Sparrow (Zonotrichia leucophrys)
Francisco Piedrahita:
Golden-crowned Sparrow (Zonotrichia atricapilla)
Francisco Piedrahita:
Golden-crowned Sparrow (Zonotrichia atricapilla)
Francisco Piedrahita:
American Tree Sparrow (Passerella arborea) (Spizelloides arborea) (Spizella arborea)
Francisco Piedrahita:
American Tree Sparrow (Passerella arborea) (Spizelloides arborea) (Spizella arborea)
Francisco Piedrahita:
Lincoln's Sparrow (Melospiza lincolnii)
Francisco Piedrahita:
Lincoln's Sparrow (Melospiza lincolnii)
Francisco Piedrahita:
Song Sparrow (Melospiza melodia) (Melospiza melodia kenaiensis)
Francisco Piedrahita:
Song Sparrow (Melospiza melodia) (Melospiza melodia kenaiensis)
Francisco Piedrahita:
Red Fox-sparrow (Passerella iliaca)
Francisco Piedrahita:
Swamp Sparrow (Melospiza georgiana)
Francisco Piedrahita:
Green-backed Sparrow (Arremonops chloronotus)
Francisco Piedrahita:
Chipping Sparrow (Spizella passerina)
Francisco Piedrahita:
Chipping Sparrow (Spizella passerina)
Francisco Piedrahita:
Savannah Sparrow (Passerculus sandwichensis)
Francisco Piedrahita:
Savannah Sparrow (Passerculus sandwichensis)