Example 2
IMG 7568

Carduelis spinus

(Siskin, Tarin des aulnes, Erlenzeisig, Lúgano común)

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9 Primaries of the left wing

 

Feathers P1 P2 P3 P4 P5 P6 P7 P8 P9
Length (mm) 45 47 49 51 54 60 63 64 63

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