Yellow Footed Gull
Adult breeding: (shown below) White head, yellow heavy bill with red spot on lower part of tip. White neck, chest, belly, and underparts. Gray back and feathers with white tips. Black tail.
Adult non-breeding: Virtually identical to the breeding adult.
Juvenile: (shown below) Young ranges from 1-3 years before aquairing adult plumage. It ranges from dull grey all over to dull brown all over, to a mix of the combinations. Bill range from all black to mostly yellow with black tips.