Francisco Piedrahita:
Western Gull (Larus occidentalis)
Francisco Piedrahita:
Western Gull (Larus occidentalis)
Francisco Piedrahita:
Western Gull (Larus occidentalis)
Francisco Piedrahita:
Western Gull (Larus occidentalis)
Francisco Piedrahita:
Yellow-footed Gull (Larus livens)
Francisco Piedrahita:
California Gull (Larus californicus)
Francisco Piedrahita:
Heermann's Gull (Larus heermanni)
Francisco Piedrahita:
Heermann's Gull (Larus heermanni)
Francisco Piedrahita:
Heermann's Gull (Larus heermanni)
Francisco Piedrahita:
Heermann's Gull (Larus heermanni)
Francisco Piedrahita:
Glaucous Gull (Larus hyperboreus)
Francisco Piedrahita:
Glaucous-winged Gull (Larus glaucescens)
Francisco Piedrahita:
Glaucous-winged Gull (Larus glaucescens)
Francisco Piedrahita:
Iceland Gull (Larus glaucoides)
Francisco Piedrahita:
Gaviotín Piquirrojo, Caspian Tern (Hydroprogne caspia) (Sterna caspia)