What surprises us is geese (the females) fighting over nesting sites. They are absolutely vicious! The prime nests are in tires we have set up. Two or three females and several males will jump on to the goose in the tire or any of the other nest sites and pick and pick on her. It is horrifying to watch. The side affect is that eggs get kicked out of nests and are ruined. The picture is of an egg that was accidentally kicked out of a nest.