Francisco Piedrahita:
River Tern (Sterna aurantia)
Francisco Piedrahita:
Whiskered Tern (Chlidonias hybridus) (Chlidonias hybrida)
Francisco Piedrahita:
Black-headed Gull (Larus ridibundus)
Francisco Piedrahita:
Black-headed Gull (Larus ridibundus)
Francisco Piedrahita:
Brown-headed Gull (Larus brunnicephalus)