These gulls were scavenging on the sea front at Ostend. It was December last uear, bitterly cold and I was with friends. Not the occasion for sitting sketching so I took lots of photographs. This sheet of studies was made in preparation for a composition. Trouble is I can't decide what species of gull they are. My best guess - based on the shape of the bill and the colour of the legs - is that they're immature Blackbacks.