When I was a teenager my Dad and i discovered a Pidgeon that had attached itself to our flock. It had an identification band on its right leg. We were going to run a "found" add in the local paper but we got into a bit of a discussion about which (right or left) leg had the band. My argument---assume the Pidgeon is "right handed, as are we. Face the Pidgeon. Shake hands with the Pidgeon. Done!