Example 2
IMG 0469

Riparia riparia

(Sand Martin, Hirondelle de rivage, Uferschwalbe, Avión zapador)

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9 Primaries of the left wing

 

Feathers P1 P2 P3 P4 P5 P6 P7 P8 P9
Length (mm) 51 58 64 68 75 81 86 91 91

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