White ring with a black two alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in the Tayside Region, UK.
Light-green ring with a black two alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in county Essex, UK.
Yellow ring with a black two alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 :