Example 1
IMG 4481

Carduelis flammea

(Redpoll, Sizerin flammé, Birkenzeisig, Pardillo sizerin)

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8 Secondaries of the left wing

 

Feather S8 S7 S6 S5 S4 S3 S2 S1
Length (mm) 32 40 42 43 44 45 46 47