Example 3
IMG 4496

Larus ridibundus

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

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10 Secondaries of the right wing

 

Feather S7 S8 S9 S10 S11 S12 S13 S14 S15 S16
Length (mm) 111 108 108 107 106 106 105 115 117 117

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