Humberto Castillo J.: Gaviota Cahuil, Brown-hooded Gull [Chroicocephalus maculipennis]
Humberto Castillo J.: Gaviota Dominicana [Larus dominicanus]
Humberto Castillo J.: Gaviota Cahuil, Brown-hooded Gull [Chroicocephalus maculipennis]
Humberto Castillo J.: Gaviota Cahuil, Brown-hooded Gull [Chroicocephalus maculipennis]
Humberto Castillo J.: Gaviota Austral, Dolphin gull [Leucophaeus scoresbii]