European Wigeon (Anas penelope) is the most abundant duck on the coast and forms large and impressive flocks. These come from northern Europe especially in October and last days of September. It is distributed in the Iberian Peninsula by coastal waters, being scarce or irregular in the interior. The name of this duck comes from the characteristic whistle that the males emit, audible at a good distance, and that consists of a sharp initial tone that is quickly cut. The females launch a very serious squawk.