Breeding bird indexes

Trends of breeding birds. Data available vanaf:1990 Changes compared to the previous version: Due to a technical error, the breeding bird indexes were of a number of types of unweighted calculated. This error has consequences for the whole time series and also trend assessment. The general and scarce breeding birds are now weighted calculated and published. A number of bird species have been added. Tree Falcon, Egg, Patty, Mustache and Water Snip are now enough observations to be able to indicate figured it out. The Great Mantle Gull and Rossy Stekeltail are new breeding birds of The Netherlands now fall within the measuring network. In addition, the naming of a number of species has changed. Goldhaan was Goudhaantje, Great Canadian goose was Canadian goose, Vuurgoudhaan was Vuurgoudhaantje and Woudaap was Woudaapje. The numbers of the Oeverloper, Arrowtail, Stone Owl and Steltkluut are not reliable enough to publish indices and are therefore out of table removed.