| Gulls |  | Black-legged Kittiwake | Red [R] | Three alpha code (3 letters). | V |  | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Black-legged Kittiwake | Yellow [Y] | Three alpha code (3 letters). | V |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Dark Green [G] | Four alpha-numeric code (4 letters/numbers). | C: |  |  | 
          
                  | Gulls | Legring : one, coded. | Eurasian Mew Gull | White [W] | Four alpha-numeric code (4 letters/numbers). | X | A till F |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Black (Niger) [N] | Four alpha code (4 letters). | G |  | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Dark Blue [B] | Four alpha-numeric code (4 letters/numbers). |  | :C |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Black (Niger) [N] | Four alpha-numeric code (4 letters/numbers). |  | :C |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  | :S | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Lesser Black-backed Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  | :S | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Orange [O] | Four alpha-numeric code (4 letters/numbers). |  | :X | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). | E |  |  | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  | :B | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Red [R] | Four alpha-numeric code (4 letters/numbers). |  | :C | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | White [W] | Four alpha-numeric code (4 letters/numbers). |  | :A | Tarsus right. | 
          
                  | Gulls | Legring : one, coded. | Black-headed Gull | Red [R] | Two alpha code (2 letters). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Yellow [Y] | Four alpha-numeric code (4 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Orange [O] | Four alpha-numeric code (4 letters/numbers). |  | H |  | 
          
                  | Gulls | Legring : one, coded. | Caspian Gull | Orange [O] | Four alpha-numeric code (4 letters/numbers). |  | H |  | 
          
                  | Gulls | Legring : one, coded. | Audouin's Gull | Dark Blue [B] | Four alpha-numeric code (4 letters/numbers). | P |  |  | 
          
                  | Gulls | Legring : one, coded. | Black-legged Kittiwake | Red [R] | Three alpha code (3 letters). | V |  | Tarsus left. | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Dark Green [G] | Two alpha code (2 letters). |  |  | Tibia right. | 
          
                  | Gulls | Legring : one, coded. | Herring Gull | Black (Niger) [N] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Great Black-backed Gull | Dark Green [G] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | White [W] | Two alpha-numeric code (2 letters/numbers). |  |  |  | 
          
                  | Gulls | Legring : one, coded. | Yellow-legged Gull | Red [R] | Two alpha-numeric code (2 letters/numbers). |  |  |  |