NDFF Distribution survey Eurasian beaver and Eurasian otter

The monitoring program aims to establish an up-to-date overview of the square kilometre plots used by beavers and otters per calendar year. The data regarding beavers is collected by staff of water boards, muskrat catchers, and the data regarding otters is collected by volunteers of the Dutch Mammal Society. Dataset available via https://www.ndff.nl/english / [e-mail] Positive observations without zeros. 615 records (March 2018) https://www.ndff.nl/overdendff/validatie/protocollen/17-207-verspreidingsonderzoek-bever-en-otter/