Between 10 and 12 million birds pass through the Wadden Sea annually on major migratory flyways.
Sources
- Global Cargo - Archaeology Magazine - May/June 2018 (archaeology.org)
- https://whc.unesco.org/en/list/1314/ (whc.unesco.org)
- https://worldheritageoutlook.iucn.org/node/1110 (worldheritageoutlook.iucn.org)
- https://www.cms.int/news/cooperation-between-world-heritage-benefit-migratory-birds-wadden-sea-and-banc-d%E2%80%99arguin (cms.int)
- https://www.waddensea-worldheritage.org/breeding-and-migratory-birds (waddensea-worldheritage.org)
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