Pink-footed Geese migration, Holkham, Norfolk. Migrating birds could risk Avian Flu (Bird Flu Virus)

anser brachyrhynchus bird flock birds of a feather stick together birdwatching british birds dusk england english countryside feathered friends flock of geese flying north flying south free freedom gander goose in silhouette indigenous species large group of geese migratory birds pink footed goose spring migration taking to the sky united kingdom upward view water fowl waterfowl wild fowl wild geese wildbirds wildfowl winter migration aves avian avians bird birds of a feather flock together blue skies blue sky companions companionship daytime flight flock of birds fly flying horizontal in flight migration natural world nature outdoors outside pecking order safety in numbers silhouettes sky scene soar soaring stock image stock photo stock photograph together togetherness wetlands wildlife wildlife photography wildlife stock height elevation altitude wild animal wild animals large group of animals side view color image color colour uk