Heuglin's Gull L heuglini

Heuglin's Gull - Larus heuglini

1-3: © Visa Rauste, 13-06-02. Syktyvkar, Russia.

An advanced bird that has replaced wing coverts, the tail and secondaries. Besides, it has renewed P8-10 in the right wing and P9-10 in the left. The underwings are strikingly white, as they are in many heuglini. Note the small mirror in P10; this is not known in western taxa.