| Gulls | Legring : one, coded. | Yellow-legged Gull | White [W] | Three alpha code (3 letters). |  |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Dark Blue [B] | Four alpha-numeric code (4 letters/numbers). | T |  |  | 
          
                  | Gulls | Legring : one, coded. | Slender-billed Gull | Black (Niger) [N] | Three alpha-numeric code (3 letters/numbers). | A or P |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Dark Green [G] | Four alpha code (4 letters). | S |  |  | 
          
                  | Gulls | Legring : one, coded. | Slender-billed Gull | Dark Green [G] | Three alpha code (3 letters). |  |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | Pale Blue [P] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | White [W] | Two alpha code (2 letters). |  |  | Tibia left. | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Pale Blue [P] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Dark Blue [B] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legrings : combination of uncoded. | Lesser Black-backed Gull |  |  |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Dark Green [G] | Two alpha code (2 letters). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Dark Green [G] | Four alpha-numeric code (4 letters/numbers). | N: |  | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Pale Blue [P] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Black (Niger) [N] | Four alpha code (4 letters). | G |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | Black (Niger) [N] | Four alpha code (4 letters). | G |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Mediterranean Gull | Red [R] | Four alpha code (4 letters). | P |  |  | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | Red [R] | Four alpha-numeric code (4 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Orange [O] | Four alpha code (4 letters). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Yellow [Y] | Three alpha-numeric code (3 letters/numbers). |  | :W | Tibia left. | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Black (Niger) [N] | Four alpha code (4 letters). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  | :U | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  | :U | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Red [R] | Four alpha-numeric code (4 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | White [W] | Three alpha-numeric code (3 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Dark Green [G] | Four alpha-numeric code (4 letters/numbers). | N: |  | Tarsus left. |