Franco Banfi / Scuba divers at Davosgja, a fissure located in Lake Thingvellir, not as famous as Silfra but a favourite with local divers, Thingvellir National Park, Iceland.

Cyril Ruoso / Male Common eider duck (Somateria mollissima) portrait, Aedey Island, Isafjardjup Fjord, Iceland, June.

Cyril Ruoso / Female Common eider duck (Somateria mollissima) portrait, Aedey Island, Isafjardjup Fjord, Iceland, June.

Terry Whittaker / Two Arctic terns (Sterna paradisaea in flight with birdwatcher watching, Flatey Island, Iceland, July 2012. Model released.

Cyril Ruoso / Atlantic Puffin (Fratercula arctica) on cliff near nest, Vestmann Island, Iceland

Cyril Ruoso / Atlantic Puffin (Fratercula arctica) profile, side view, Vestmann Island, Iceland

Cyril Ruoso / Atlantic Puffin (Fratercula arctica) pair, Vestmann Island, Iceland

Cyril Ruoso / Atlantic Puffin (Fratercula arctica) perching, Vestmann Island, Iceland

Brent Stephenson / Adult Atlantic Puffin (Fratercula arctica) on rock near its breeding colony on Vigur Island, Iceland, July.

Brent Stephenson / Adult Atlantic Puffin (Fratercula arctica) on rock near its breeding colony on Vigur Island, Iceland, July.

Brent Stephenson / Adult Atlantic Puffin (Fratercula arctica) on rock near its breeding colony on Vigur Island, Iceland, July.

Brent Stephenson / Adult Atlantic Puffin (Fratercula arctica) on rock near its breeding colony on Vigur Island, Iceland, July.