The odd couple: Extraordinary picture of a tiny frog 'riding' on a beetle's back leads entries to amateur photography contest Photo by Nicolas Reusens Boden is one of the entries for the 2014 Sony World Photography Awards This extraordinary photograph shows the unexpected bond between a tiny tree frog and a huge beetle. The image was captured by an amateur photographer, and is one of the entries for a prestigious photography competition showcasing unique images from around the world. Nicolas Reusens Boden, from Sweden, took the picture of the red-eyed tree frog, which is around 2cm long, at the moment it landed on the back of a beetle. 'The knight and his steed': This photograph by Nicolas Reusens Boden, from Sweden, shows a red-eyed tree frog on the back of a beetle 'Arbore sandstorm': Carlos Duarte, from Spain, took this picture of a boy in the immediate aftermath of a sandstorm in the Omo Valley, Ethiopia 'The reunion': Portuguese photographer Sinan Dinis took this picture during a trip to Amsterdam, stitched together from four different images He said he took it during a photography workshop in a 'controlled' environment, adding: 'The frog managed to jump to the branch where this huge titan was sleeping. I had my gear ready so I only had to change a few settings and shoot - the rest is history. A selection of photographs from the 'open' category of the 2014 Sony World Photography Awards have been released in order to encourage more enthusiasts to come forward with their photos before the deadline in a month's time. 'Over the Dome': Briton Kevin John Bleasdale stood on the ground next to The O2 and photographed tourists climbing on top of the structure 'The last summer day': Igor Kryzhko photographed a female reveller at a paint festival in Novorssiysk, Russia on August 31 this year 'Fashion Muslim': Simone Sapienzia travelled from Italy to Istanbul's conservative Fatih district to capture the image of well-dressed women in veils Entry: Cory Kipa from New Zealand took this photograph of a family of giraffes sheltering from the rain in a cave Another striking image, taken by Carlos Duarte, shows the aftermath of a sandstorm which whipped through the Omo Valley in Nigeria. The photographer said: 'It was an incredible moment, women protecting themselves from the storm with their clothes, and I closed my eyes. When I thought the storm was over, I opened my eyes and I saw this boy seating on an old tree. Sinan Dinis, from Portugal, took an eerie panoramic photograph of a ring of wooden posts standing on a beach in Amsterdam, which he dubbed 'The Reunion'. 'God offered me this moment,' he said. No one around, total silence and harmony, giving me the sensation that I was in the presence of a reunion, an assembly - all listening to the one in the middle, the wise one. 'Be cheerful even in the darkest of times': Samantha Fortenberry photographed her friends during a summer rainstorm in Scottsboro, Alabama Encounter: Joyce Le Mesurier, from Singapore, photographed a young boy trying on the mask of a resting dancer at a festival in Bhutan 'Underground': Holger Schmidtke's image of the main subway station in Duisburg, Germany Closer to home, Kevin John Bleasdale captured a picture of tourists climbing on top of The O2 in Greenwich, with quirky-looking buildings in the foreground. Another joyous image, by Samantha Fortenberry, shows the heart-warming sight of a group of friends cavorting in the rain during a summer swimming session in Scottsboro, Alabama. And Simone Sapienzia's entry in the competition carries a more serious message, as she shows two Muslim women in Istanbul wearing the traditional hijab, but nonetheless bearing fashionable and brightly coloured handbags and umbrellas. As well as the 'open' category for amateurs, the Sony World Photography Awards has categories for professionals, students and schoolchildren. Nostalgia: Pedro Londono describes this amusement park in Medell, Colombia as 'the place where childhood is recalled' 'Sorrow': Eugene Stulov's photograph of Lili Bolgashvili in the dressing room of the Mossovet Theatre in Moscow 'The sons of the Angh of Nyahnyu': Sergio Carbajo, from Spain, photographed two young boys who are heirs to the rulership of a village in India's remote state of Nagaland