4cy European Herring Gull Green YCDZ – May/June 2019
Adult European Herring Gull Green YCUZ with Thayeri-pattern on P9 and P10 – 20190703
Lesser Black-backed Gull chicks – 20190603
Adult Lesser Black-backed Gulls from the IJmuiden Forteiland colony fitted with GPS-loggers – 20190524
Visit to the gull colony of IJmuiden – 20190506
5CY Lesser Black-backed Gull Green YBXJ with sub-adult plumage – 20190506
Visit to the gull colony of IJmuiden – 20190429
Lesser Black-backed Gull Green YBJB primary pattern update – 2019
Visit to the gull colony of IJmuiden – 20190423
Visit to the gull colony of IJmuiden – 20190415
