Cranes of different varieties now live in a much warmer housing at the Niaoyu Forest Zoo in Harbin, Heilongjiang province. New warm houses were constructed for the cranes, including red-crowned cranes, white cranes, grey cranes and demoiselle cranes. The temperature in the houses is kept around 10 degrees Celsius. The windows were built with French windows so as to let the sunshine go directly into the houses. [Photo/my399.com]