Example 2
IMG 0087

Apus apus

(Swift, Martinet noir, Mauersegler, Vencejo común)

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10 Primaries of the right wing

 

Feather P10 P9 P8 P7 P6 P5 P4 P3 P2 P1
Length (mm) 133 135 132 118 103 89 77 66 55 46

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