@brillomick Yes at the RSPB they put a ring on some of the birds to see how long they live and where they travel too. It's interesting to know how long a bird has been about. I wish I could tag my little robin who visits in the garden but I can always identify him by his movements, i.e. where he lands and whether he comes over to eat from my hand. I have been photographing Robbie for 2 years now.