Red ring with white code (mainly on right tibia).
Roland-Jan Buijs, Philips van Dorpstraat 49, NL-4698 RV Oud-Vossemeer, The Netherlands.
Tel.: +31-(0)-166-61.73.70.
Mobile : +31-(0) 6-18672392
E-mail: rjbuijs@hetnet.nl or r.buijs@rocwb.nl
website: http://www.gull-research.org/
Note: rings are 1,8cm. in height and re placed above the knee (on the tibia) for better observation results in the colony (high vegetation) and on rubbish-dumps.
Note: the position of the metal ring can be left tibia or left tarsus.
