013680 01 Bird Waterfowl Activity Adult Adults Age Of Subject Anatidae Animal Animal Behavior Animal Behaviors Animalia Animals Anseriformes Anserinae Aves Barnacle Goose Barnacle Geese Behavior Behaviors Bird Birds Branta Branta Leucopsis Characteristic Flight Flock Flying Geese Goose Greenland Location Migrate Migrating Migration More Than Two Multiple Multitude Multitudes Nature North America North American Number Of Subjects Social Animal Social Structure Species Subject Vertebrata Vertebrate Vertebrates Water Bird Water Birds Water Fowl Waterbird Waterbirds Waterfowl Wildlife Frans Lanting Frans Lanting Frans Lanting Ph © Frans Lanting Frans Lanting Photography Barnacle geese migrating south Branta leucopsis Greenland