In the last few years more and more Greylags choose to overwinter in Iceland instead of going to the British Isles. They are now unusually many on Ölfusá River near Selfoss. The group counts more than 500 birds. It is winter weather now with snow and frost and soon the river will freeze over. Whether the group decides to stay or leave remains to be seen. Will they decide to stay and struggle through the winter or flee to warmer places?