Example 12
IMG 4661

Larus ridibundus

(Black-headed Gull, Mouette rieuse, Lachm÷we, Gaviota reidora)

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6 Tail-feathers

 

Feather T6 T5 T4 T3 T2 T1
Length (mm) 122 123 120 118 115 112

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