Presumed 2cy Heuglin's Gull L heuglini

An example of a 2cy Heuglin's Gull strongly resembling Caspian Gull L cachinnans.

Bird with unmarked, pale grey upperparts, streaked head and rather worn juvenile wing coverts.

Similar to the previous bird but with typical white head (with "neck collar") and underparts.

A worn bird with strongly marked scapulars.

Another individual with unmarked (except for shaft streaks) scapulars and rather fresh-looking juvenile wing coverts.

A worn bird that has started the first complete moult rather early.

A strong, boldly marked individual.

A pale bird with boldly marked feathers.

A bird with a plainer type of scapulars than the previous two birds but the second generation wing coverts and tertials are of the same type, albeit much more worn.

Another very pale bird with a jizz similar to Caspian Gull.

A pale individual in the extreme.

A bird with plain, darker feathers.

A darker bird than the previous one.

A bird showing darker, plain but no adult-type feathers.

A dark bird showing markings in the renewed wing coverts.

Another dark type Heuglin's Gull showing many adult-like feathers.

A really advanced bird which at first sight could easily be taken for a 3cy.

A bird that has replaced P1-7 on the wintering grounds.