Hen Harrier. ♂ Adult

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Arpella pàl·lida Circus cyaneus. Mascle adult. Octubre. Catalunya / Hen Harrier. Adult male. Catalonia. Àlex Ollé.
  • Alguns mascles tenen la muda endarrerida, i la fórmula alar s’assembla a l’arpella pàl·lida russa o inclús un híbrid amb aquest / Some males have a delayed molting, and resembling a wing-formula of the Pallid Harrier or even a hybrid with this.
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