NDFF Bird nest survey

The nest map project is aimed at collecting data about the breeding biology of all birds that breed in the Netherlands. Anyone can join by filling in a form about any nest they find with at least one egg in it, and sending the data to Sovon Dutch Centre for Field Ornithology. The data will be checked and processed there. Positive observations without zeros. Dataset available via https://www.ndff.nl/english / [e-mail] https://www.ndff.nl/overdendff/validatie/protocollen/14-003-nestkaarten/