Juvenile geese and older individuals without a partner of e.g. Barnacle geese, start molting at the same time. As they cannot fly, they join together in large flocks that graze, walk and swim together. These flocks can be very big but are still extremely cautious. We saw, for example, a flock of Pink-footed geese that most certainly contained five to six hundred geese. This particular flock of Barnacle geese swam away from us at a rapid pace.