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I think your butterfly is a "simple" swallowtail....Papilio machaon as opposed to the Spanish, Southern or Scarce swallowtail - Iphiclides podalirius f. feisthameliiMain difference is the amount of blue near the wing tips, I think.
It's a beauty, Cliff and precious little simple about it, I'm sure. You had good luck with flora and fauna in the Picos, it seems. Are you home now?