Orange wingtag (on both wings) with a black three alpha-numeric code.
note 1 : used codes are : E00-E99 ; X00-X99 ; Y00-Y99.
note 2 : birds marked in the Sternberger Seenland Regio (E. of Schwerin, Mecklenburg-Vorpommern, Germany.) and direction Güstrow und Schwaan (N and E).