27 enero 2015
Norway’s small birds face many challenges during the winter, including short days and long energy-intensive nights, tough weather conditions and food shortages, along with the risk of becoming a meal for hungry predators. Many at a tiny size, how do they survive?
http://feeds.sciencedaily.com/~r/sciencedaily/~3/rv_Au1S-SJY/150127100159.htm
