Example 11
IMG 0280

Garrulus glandarius

(Jay, Geai des chênes, Eichelhäher, Arrendajo común)

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6 Greater primary coverts, 5 greater secondary coverts, 1 alula-feather (1st row)
3 greater secondary coverts, 6 greater primary coverts, 3 alula-feathers (2nd  row)

 

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