Bird ringer

My friend Peter, a bird enthusiast, found a dead petrel on Stewart Island off the southern tip of New Zealand. Petrels fly the southern oceans, circumnavigating the globe, stopping occasionally to lay an egg, and bring up a youngster before returning to the oceans.The bird had a ring, which he carefully extracted and sent back to the appropriate record keeping centre. Three months later, his parents (also bird enthusiasts) were attending the sherry party reception for a specialist birders weekend in Aberdeen and met a man who dedicated himself to bird ringing. To cut a long story short, they discovered to their amazement that they were talking to the man who had placed the ring on the very same bird's leg six months earlier ...... in an expedition to Tierra del Fuego at the southern tip of South America !