R E U T E R S: London April 17th 2007. Zoologists from The British Natural History Museum, working in partnership with conservationists from London zoo have confirmed the discovery of a new species of pigeon thus far only seen in London. The bird is thought to have evolved over the course of some 50 to 70 years of in-breeding whilst trapped within the London underground network. The same size as its surface dwelling cousin, this species has evolved flightless and travels to other parts of the city using the trains as its mode of transport. The bird sits beneath the passengers seats for the most, undetected and exits the vehicle at its chosen destination, homing instincts are thought to play a major roll in this as the birds always arrive back at their home stations later on in the day.