Migratory Starlings and wood pigeons at Thames Estuary. Avian Flu (Bird Flu) could be brought to Britain from Europe by migrating birds.

assemble assembly birds of a feather stick together birds on a wire birdwatching british birds collection england english starlings flocking flying together freedom gathering to roost insulators large group of birds muster on a line pigeons power mast rendezvous roosting sit starlings take to the sky telephone mast wild fowl animal behavior animal behaviour aves avian avians bird bird on a wire birds of a feather flock together congregation daytime feathers flock of birds horizontal in a line migration natural world nature outdoors outside perch perched perching power cables rest resting sitting stock image stock photo stock photograph telephone wires wild birds wildlife photography wildlife stock large group of animals animal animal themes height elevation altitude flight in flight flying wild animal wild animals wildlife safari safari safaris safari destinations safari destination nature reserve habitat logistics color image color colour united kingdom uk conservation