Yellow-footed Gull (Larus livens) adult attacking a juvenile on Isla San Esteban in the upper Gulf of California (Sea of Cortez) , Mexico.

larus livens yellow footed gull isla san esteban gulf of california sea cortez seagull seabird aves chick yellow footed gull gulls larus livens adult juvenile isla san esteban gulf of california sea of cortez mexico yellow footed birds bird