Springwatch Unsprung: Why Do Robins Have Red Breasts?. Jo Stevens

Despite their name, Arctic terns fly from the Antarctic pack ice 20,000 kilometres away and have the longest recorded migration of any bird on the planet. Swallows arrive from South Africa about 9,500 kilometres from the UK, swifts return from spending the winter in central Africa about 6,500 kilometres away and ospreys migrate more than 5,000 kilometres from west Africa.