'A little while back I took some photographs of shore-birds, many of which are migratory and fly to the Arctic in our autumn to breed. Some of the godwits I photographed had orange leg-tags and when I zoomed in I could read the letters and numbers, so I reported these on a website that tracks migratory birds and which tells me these birds were tagged one year ago, in exactly the same place. This means that during 2016 they flew from here, over the South Pacific and southern Asia to China, where for millions of years they have fed on the mudflats in the Yellow Sea between the mainland and the Korean peninsula. Then they fly further north to either Siberia or Alaska. And after the breeding season they fly all the way back. Recently a small transmitter was put in a godwit that flew from Alaska to New Zealand in one go without stopping to eat or rest.' (Introduction)