A safe sign of spring—The Cranes (Grus grus) returned from their winter migration, stopping at the same stop at the Hornborga Lake in southern Sweden. Some 10,000 of the four foot tall, 15 pound birds landed at Lake Hornborga and began trumpeting, dancing and mating while 150,000 bird watchers watched.
More info on Hornborgasjön: http://www5.o.lst.se/projekt/hornborga/eng/index.asp