Jose B. Ruiz / Audouin's gull {Larua audouinii} Columbretes Islands, Castellon, Spain

Juan Manuel Borrero / Audouin's gull {Larua audouinii} with chick, Delta del Ebro National Park, Catalonia, Spain

Juan Manuel Borrero / Audouin's gull newly hatched chick and eggs in nest {Ichthyaetus audouinii} Delta del Ebro NP, Spain Catalonia

Juan Manuel Borrero / Illustration of Audouin's Gull (Larus audouinii). Near Threatened species. Pencil and watercolor painting.

Mike Read / Audouin's Gull (Ichthyaetus audouinii) adult in flight. Near Barcaggio Cap, Corsica, April.

Nick Upton / Audouin's gull (Ichthyaetus audouinii) hovering low over the sea. Near Ajaccio, Corsica, France, May.

Nick Upton / Audouin's gull (Ichthyaetus audouinii) alighting on sea surface. Near Ajaccio, Corsica, France, May.

Nick Upton / Immature Audouin's gull (Ichthyaetus audouinii) flying low over the sea. Near Ajaccio, Corsica, France, May.

Francis Abbott / Audouin's Gull (Ichthyaetus audouinii) nest with hatchling and one egg, Isla del Aire, Menorca. Endangered.

Francis Abbott / Audouin's Gull (Ichthyaetus audouinii) nest with two eggs, Isla del Aire, Menorca. Endangered

Inaki Relanzon / Audouin's Gull (Ichthyaetus audouinii), Menorca, Balearic Islands, Spain

Inaki Relanzon / Audouin's Gull (Ichthyaetus audouinii) pair, one calling, Menorca, Balearic Islands, Spain

Juan Manuel Borrero / Audouin's Gull {Ichthyaetus audouinii} Delta del Ebro NP, Catalonia, Spain

Juan Manuel Borrero / Audouin's gull (Ichthyaetus audouinii) standing on beach, Delta del Ebro NP, Spain

Juan Manuel Borrero / Adult Audouin's gull (Ichthyaetus audouinii) walking with chick beneath, Delta del Ebro NP, Spain

Jose B. Ruiz / Audouin's gull (Ichthyaetus audouinii) panting while sitting on nest, thermoregulation behaviour, Columbretes Islands, Spain

Jose B. Ruiz / Audouin's gull on nest {Ichthyaetus audouinii} Columbretes Is, Spain, Europe

Jose B. Ruiz / Audouin's gull feeding on fish {Ichthyaetus audouinii} Spain

Jose B. Ruiz / Audouin's gull {Ichthyaetus audouinii} Spain

Robin Chittenden / Audouin's gull (Ichthyaetus audouinii) on rock calling, Menorca, Spain, May

Robin Chittenden / Audouin's gull (Ichthyaetus audouinii) in flight, Menorca, Spain, May