Espen Bergersen / Adult male King eider (Somateria spectabilis) portrait from behind also showing triangular black sails on the back and white sides of rump. Batsfjord, Norway, March.

Franco Banfi / Scuba diver under ice, surfacing to the hole, viewed from underneath, Arctic circle Dive Center, White Sea, Karelia, northern Russia March 2010. No release available.

Alex Hyde / Indian moon / Indian luna moth (Actias selene) photographed on a white background. Captive.

Edwin Giesbers / Silhouette of Black-winged stilt (Himantopus himantopus) standing on exposed rock over water, with reflections, Lesbos, Greece

Nick Garbutt / Male Comet / Madagascar moon moth (Argema mittrei) recently emerged drying its wings. Andasibe-Mantadia National Park, Madagascar.

Constantinos Petrinos / Funeral parlor in Addis Ababa with a selection of triangular funeral flower wreaths arranged to form a Christian cross. Addis Ababa, Addis Abeba, Ethiopia. February 2009

Alex Mustard / Diver swimming through Tolberone Tunnel, a triangular tunnel through the middle of an island in Raja Ampat. Giant barrel sponges (Xestospongia muta) growing on the floor of the tunnel, which have an u...

MYN / Lily Kumpe / Triangular Spider (Arkys lancearius) Denmark Shire, Warren Bioregion, Western Australia. Meetyourneighbtous.net project

MYN / Lily Kumpe / Triangular Spider (Arkys lancearius) Denmark Shire, Warren Bioregion, Western Australia. Meetyourneighbtous.net project

Franco Banfi / Maina, the sawed triangular entry hole to dive under the ice, Arctic circle Dive Center, White Sea, Karelia, northern Russia March 2010

Franco Banfi / Two Scuba divers at the maina (sawed triangular entry hole) with melted ice ready to go diving under the ice, Arctic circle Dive Center, White Sea, Karelia, Northern Russia, March 2010

Franco Banfi / Scuba diver sitting on the maina (sawed triangular entry hole) with melted ice ready to go diving under the ice, Arctic circle Dive Center, White Sea, Karelia, Northern Russia, March 2010