Adult birds in August. Description will follow.
PDF: Sex Differentiation of Yellow-legged Gull (Larus michahellis lusitanius): the Use of Biometrics, Bill Morphometrics and Wing Tip Coloration. JUAN ARIZAGA, ASIER ALDALUR, ALFREDO HERRERO AND DAVID GALICIA.
|Yellow-legged Gull lusitanius ZM6C August 27 2010, Galicia, Spain. Picture: Gabriel Martín. P6/P9. Bird also seen in December.