A visitor stands behind an illustration of a Polar owl, part of an exhibition at the Summer Garden, in St. Petersburg May 23, 2013. The annual street photo-exhibition, which consists of 60 photos displaying animals and birds listed in the Red Book of Russia, was organized to match the International Day for Biological Diversity introduced by the United Nations General Assembly and marked on May 22, according to representatives. REUTERS/Alexander Demianchuk (RUSSIA - Tags: SOCIETY ENVIRONMENT ANNIVERSARY ANIMALS TPX IMAGES OF THE DAY)