Nick Upton / Shoal of young sardines (Sardina pilchardus) swimming in various directions close to the shore in a shallow sandy bay, viewed from above water. Eastern Lesbos /Lesvos, Greece, August.

Nick Upton / Shoaling young sardines (Sardina pilchardus) swimming in shallow water in a sandy bay, casting shadows on the seafloor, viewed from above water. Eastern Lesbos / Lesvos, Greece, August.

Mathias Schaef/ BIA / Eastern Orphean Warbler (Sylvia crassirostris) male calling, Lesvos, Greece

Nick Upton / Great / Eastern white pelican (Pelecanus onocrotalus) resting on quay side near fishing boats, Skala Kalloni harbour, Lesbos / Lesvos, Greece, June.

Nick Upton / Shoal of young sardines (Sardina pilchardus) swimming in shallow water in a sandy bay, viewed from above water. Eastern Lesbos/Lesvos, Greece, August.

Nick Upton / Close up view of shoaling young sardines (Sardina pilchardus) swimming in shallow water in a sandy bay, viewed from above water. Eastern Lesbos/Lesvos, Greece, August.

Nick Upton / Shoal of young sardines (Sardina pilchardus) circling in a tight formation in shallow water in a sandy bay, viewed from above water. Eastern Lesbos / Lesvos, Greece, August.

Nick Upton / Close up view of shoaling young sardines (Sardina pilchardus) swimming in shallow water in a sandy bay, casting shadows on the seafloor, viewed from above water. Eastern Lesbos / Lesvos, Greece, Augus...

Nick Upton / Shoal of young sardines (Sardina pilchardus) swimming in various directions close to the shore in a shallow sandy bay, viewed from above water. Eastern Lesbos /Lesvos, Greece, August.

DAVID TIPLING / Eastern white pelican (Pelecanus onocrotalus). Kalloni harbour, Lesbos, Greece, Europe

Mathias Schaef/ BIA / Eastern Orphean Warbler (Sylvia crassirostris) male, Lesvos, Greece

Robin Chittenden / Eastern subalpine warbler (Sylvia cantillans) taking off, Lesbos, Greece, April.