| Gulls | Legring : one, coded. | Lesser Black-backed Gull | Yellow [Y] | Five alpha code (5 letters). | H |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Dark Green [G] | Three alpha-numeric code (3 letters/numbers). |  |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Audouin's Gull | Dark Green [G] | Three alpha-numeric code (3 letters/numbers). | C |  |  | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Dark Blue [B] | Four alpha-numeric code (4 letters/numbers). | N | N |  | 
          
                  | Gulls | Legring : one, coded. | Black-legged Kittiwake | Dark Blue [B] | Three alpha-numeric code (3 letters/numbers). | A |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Red [R] | Four alpha-numeric code (4 letters/numbers). | W: |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). | E |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-legged Kittiwake | Orange [O] | One alpha code (1 letter). |  |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Yellow [Y] | Five alpha code (5 letters). | H |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Black (Niger) [N] | Four alpha code (4 letters). | G |  |  | 
          
                  | Gulls | Legring : one, coded. | Eurasian Mew Gull | White [W] | Four alpha code (4 letters). | E |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Red [R] | Four alpha-numeric code (4 letters/numbers). | K |  |  | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | White [W] | Four alpha-numeric code (4 letters/numbers). |  | :C |  | 
          
                  | Gulls | Legring : one, coded. | Slender-billed Gull | Black (Niger) [N] | Four alpha code (4 letters). | G |  |  | 
          
                  | Gulls | Legring : one, coded. | Slender-billed Gull | Black (Niger) [N] | Four alpha-numeric code (4 letters/numbers). | G |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | White [W] | Three alpha-numeric code (3 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | Black (Niger) [N] | Four alpha-numeric code (4 letters/numbers). | J |  |  | 
          
                  | Gulls |  | Iceland Gull | Yellow [Y] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Yellow [Y] | Five alpha code (5 letters). | H |  |  | 
          
                  | Gulls | Legring : one, coded. | Audouin's Gull | Yellow [Y] | Three alpha-numeric code (3 letters/numbers). | M |  |  | 
          
                  | Gulls | Legrings : combination of one coded and uncoded rings. | Lesser Black-backed Gull | Red [R] | One alpha code (1 letter). | K |  | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Mediterranean Gull | Black (Niger) [N] | Four alpha-numeric code (4 letters/numbers). | 8 |  |  | 
          
                  | Gulls | Legring : one, coded. | Slender-billed Gull | Dark Green [G] | Four alpha code (4 letters). | A |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | White [W] | Four numeric code (4 numbers). | 2 |  |  |