Some animals appear to be climate winners. The graylag geese, for example. It has gone from being almost threatened by extinction in the 1970s to currently being “everywhere”. In some areas, they are now so numerous that it is difficult to produce grass for cows and sheep. In this educational tool-kit, you will learn how geese largely outsmart the people trying to scare them away! This is part two of a series of tool-kits on animal invasion. It focuses on birds. A general introduction to the subject is given in Animal invasion (part 1).