Red ring with a white 3 alpha code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in county Oxfordshire, UK.
note 2 : code starts with A.
Black ring with a white 3 alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : codes used (2013 to 2019): A01-A99, B01-99, C01-99, D01-99, F01-99, H01-99, J01-99, K01-99.
note 2 : birds ringed in county Suffolk, UK.
note 3 :
Dark-blue ring with a white 2 alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in the UK, county Norfolk.
note 2 :
Orange ring with a black 3 alpha code (on right leg) and c-ring above metal ring (on left leg).
note 1 : birds ringed in the UK, county Hampshire.
note 2 : c-ring on left leg = colony marker (white, yellow, red, orange, blue).
note 3 : first letter A or B.
Orange ring with a black 2 alpha-numeric code (on right leg) and c-ring above metal ring (on left leg).
Red ring with a white 2 alpha-numeric code (on left leg) and metal ring (on right leg).
Black ring with a white 2 alpha code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in the village of Skeld on the west side of Shetland, UK to study a probable isolated population of this species.
White ring with a black 3 alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in Cornwall, United Kingdom.
note 2 : used codes are : A00-A99, B00-B99, etc .
note 3 : A01-A09 used in Devon, United Kingdom - Dr. Ian Stanbridge (stan@thestanbridges.com)
Combination of 3 plain c-rings: 1 c-ring above metal (on left leg) and 2 c-rings (on right leg).
note 1 : birds ringed in the UK, Grampian Region.
Yellow ring with a black 2 alpha-numeric code (on left leg) and metal ring (on right leg).
note 1 : birds ringed in county Tipperary, Ireland.