John Chan / Two male Southern Pacific rattlesnakes (Crotalus oreganus helleri) fighting during mating season. This behaviour is known as a "combat dance", and is used to determine dominance and the right to mate...

Remi Masson / Common toads (Bufo bufo) mating surrounded by strings of toadspawn. Ain, Alps, France. First prize in the category "The Underwater World, GDT European Wildlife Photographer of the Year 2014 competiti...

Claudio Contreras / Prickly pear (Opuntia sp.) growing on coastline, Socorro Island, Revillagigedo Archipelago National Park (Socorro Islands), Pacific Ocean, Western Mexico, November, Honorary Mention in the third natio...

Ingo Arndt / Aerial view of the "American Falls / Horseshoe Falls", Niagara Falls, North America

Ingo Arndt / Aerial view of "American Falls / Horseshoe Falls", Niagara Falls, North America

Ingo Arndt / Aerial view of the "American Falls", Niagara Falls, New York, USA

Ingo Arndt / "CTD" (instrument for collecting water samples from all water depths) at work 50 km from the ice floe base. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute; Bremerhav...

Ingo Arndt / Graphic from "ice thickness profile" of the (ISPOL) ice floe. ISPOL (ICE Station Polarstern) Expedition 2004/2005 from Alfred Wegener Institute, Bremerhaven, Germany. The Icebreaker Polarstern was dri...

Ingo Arndt / Researcher preparing "Bongo" net for sampling zooplankton on Expedition ship, Polarstern, Weddell Sea, Antarctica

Thomas Hinsche/ BIA / White-tailed Eagle (Haliaeetus albicilla) flying, Poland

Marcos Baumann/ BIA / Speckled Teal (Anas flavirostris) flying, Valparaiso, Chile

Thomas Hinsche/ BIA / Common Buzzard (Buteo buteo) pair fighting, Saxony-Anhalt, Germany