Larus armenicus 3cy, 15 November 2010, Maayan Zvi eastern ponds, Israel. Picture: Amir Ben Dov.
Mirror on both P10, 3rd gen primaries and secondaries with obvious dark centres on most feathers indication for age. Note black in the tail and brownish centres of the greater primary coverts. Mirror on P10, tail-feathers predominantly white and limited markings on secondaries (3rd gen feathers) indicate 3cy age. Primaries P4-P7 with white tips and inner primaries lacking dark on outer-webs (adult-like pattern) is another clue.
Bird showing fishing technique.
|