Example 2
IMG 7553

Acrocephalus scirpaceus

(Reed Warbler, Rousserolle effarvatte, Teichrohrsänger, Carricero común)

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10 Primaries and 2 alula-feathers of the left wing

 

Feather P1 P2 P3 P4 P5 P6 P7 P8 P9 P10   A2 A1
Length (mm) 48 49 50 51 52 53 54 53 50 13   11 17

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