Year of compilation: 2017
Data for the IBA criteria assessment was provided and analysed by Sovon, Dutch Centre for Field Ornithology, as commisioned by the Dutch BirdLife Partner (The Society for Protection of Birds, VBN).
BirdLife International (2022) Important Bird Areas factsheet: Biesbosch. Downloaded from
http://www.birdlife.org on 10/08/2022.