Example 2
IMG 0318

Hirundo rustica

(Barn Swallow, Hirondelle rustique, Rauchschwalbe, Golondrina común)

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9 Secondaries of the left wing

 

Feathers P1 P2 P3 P4 P5 P6 P7 P8 P9
Length (mm) 61 68 75 81 88 94 99 106 105

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