Francisco Piedrahita: Yellow-legged Gull (Larus michahellis)
Francisco Piedrahita: Lesser Black-backed Gull (Larus fuscus)
Francisco Piedrahita: European Herring Gull (Larus argentatus)
Francisco Piedrahita: European Herring Gull (Larus argentatus)
Francisco Piedrahita: European Herring Gull (Larus argentatus)
Francisco Piedrahita: Glaucous Gull (Larus hyperboreus)
Francisco Piedrahita: Glaucous Gull (Larus hyperboreus)
Francisco Piedrahita: Glaucous Gull (Larus hyperboreus)
Francisco Piedrahita: Great Black-backed Gull (Larus marinus)
Francisco Piedrahita: Great Black-backed Gull (Larus marinus)
Francisco Piedrahita: Great Black-backed Gull (Larus marinus)
Francisco Piedrahita: Great Black-backed Gull (Larus marinus)
Francisco Piedrahita: Lesser Black-backed Gull (Larus fuscus)
Francisco Piedrahita: Lesser Black-backed Gull, Baltic Gull (Larus fuscus) (Larus fuscus fuscus)
Francisco Piedrahita: Lesser Black-backed Gull, Baltic Gull (Larus fuscus) (Larus fuscus fuscus)
Francisco Piedrahita: Slender-billed Gull (Larus genei) (Chroicocephalus genei)
Francisco Piedrahita: Black-headed Gull (Larus ridibundus)
Francisco Piedrahita: Black-headed Gull (Larus ridibundus)
Francisco Piedrahita: Black-headed Gull (Larus ridibundus)
Francisco Piedrahita: Black-headed Gull (Larus ridibundus)
Francisco Piedrahita: Black-legged Kittiwake (Rissa tridactyla)
Francisco Piedrahita: Black-legged Kittiwake (Rissa tridactyla)
Francisco Piedrahita: Black-legged Kittiwake (Rissa tridactyla)
Francisco Piedrahita: Black-legged Kittiwake (Rissa tridactyla)
Francisco Piedrahita: Mew Gull, Common Gull (Larus canus)
Francisco Piedrahita: Mew Gull, Common Gull (Larus canus)
Francisco Piedrahita: Gaviotines Comunes (Sterna hirundo)
Francisco Piedrahita: Arctic Tern (Sterna paradisaea)
Francisco Piedrahita: Arctic Tern (Sterna paradisaea)
Francisco Piedrahita: Arctic Tern (Sterna paradisaea)