Adult in summer plumage (right) and a 2nd calendar year summer plumage (left) from Mediterranean Gulls. Also an adult summer plumage Black headed gull (bottom right)

Audouin Birding Tours - Birdwatching in Spain, Morocco, Turkey and more - Extremadura, Andalucia, Aragon and Catalonia - http://www.audouinbirding.net/

This picture was taken in one of the tours to the Pyrenees, Guara, Monegros, Ports, and the Ebro Delta with guides from Audouin Birding Tours http://www.audouinbirding.net/

Esta foto fue tomada en una de las excursiones a los Pireneos, Guara, Monegros, Ports y Delta del Ebro de Audouin Birding Tours http://www.audouinbirding.net/

Aquesta foto va ser presa en una de les sortides als Pirineus, Guara, Monegros, Ports i Delta de l'Ebro de Audouin Birding Tours http://www.audouinbirding.net/

Audouin Birding Tours - Excursiones para la observacion de Aves en el Delta del Ebro, Ports y otras destinaciones en Catalunya, España y extranjero - http://www.audouinbirding.net/