“ I learned to ring birds there and studied migration. By the late ’ 60 ’ s, I was ringing between 12,000 and 20,000 birds a year as a hobby.
„ Seal õppisin linde rõngastama ja uurisin nende rändeid. 1960 - ndate aastate lõpus rõngastasin igal aastal harrastusena 12000 kuni 20000 lindu.