NDFF Dragonflies distribution research

This project has resulted in the publication ‘Dutch Dragonflies’, which includes occurrence records of dragonflies in the Netherlands. The current project aims to map changes to these populations. Reports that contribute to occurrence research of dragonflies are either made by means of area inventories or individual observations. The observations are checked by an expert and the observer is contacted if anything is unclear. Dataset available via https://www.ndff.nl/english / [e-mail] Positive observations without zeros. 669,802 records (March 2018) https://www.ndff.nl/overdendff/validatie/protocollen/7-001-verspreidingsonderzoek-libellen/