A wood sandpiper looks for food in the wet land in Liminka Bay, Finland, on May 13, 2016. Liminka Bay, located in northwestern Finland, is one of the most valuable bird habitats in Europe, where more than 200 different species of birds arrive annually, more than 160 of which nest in the area. Every spring, migrant birds begin to gather here. It is a preferred place for bird watching and bird photography in Finland. [Photo/Xinhua]