Viktor Natykanets from the National Academy of Sciences provided January counts for 2013.
Koen Devos from the Research Institute for Nature and Forest (INBO) provided all January counts until 2013.
Tibor Mikuska from Croatian Society for Bird and Nature Protection provided all January counts until 2013.
Hamid Amini Tareh from the Department of Environment provided all January 2013 counts.
Menno Hornman from SOVON provided January, goose and seaduck counts until 2012.