Translated from the Dutch SOVON ornithologists:
Friday, April 17th, 2015
On Wednesday, April 15th large numbers of Mediterranean gulls flocked into our country. Counter Bert van Broekhoven even recorded a new national record from the counting site near Terneuzen: 238 Mediterranean gulls flying along. With its distinctive mewing cry and clear white wings this striking gull is conquering our country rapidly. Since the establishment of this species in the 80s of the last century it has increased exponentially.