1. L. W. Andersen (https://orcid.org/0000-0003-3225-9917) ✉ (lwa@bios.au.dk), J. Kahlert and A. B. Madsen, Dept of Bioscience.
2. H. S. Schousgaard, Rønrøgel 5h, Nordenskov, Varde, Denmark.
3. A. Linnet, Næstrupvej 41, Sjørring, Thisted, Denmark.
4. O. H. Jensen, Danish Nature Agency, Skørping, Denmark.
5. E. A. Thomsen, Park & Natur, Aalborg Kommune, Nørresundby, Denmark.
6. F. Sørensen, Teknik og Miljø, Varde Kommune, Varde, Denmark.
7. H. J. Baagøe, Natural History Museum of Denmark, Copenhagen, Denmark.
8. J. Frikke, The Wadden Sea National Park, Rømø, Denmark.
9. H. Jacobsen, Lystruphave Økologi, Bryrup, Denmark.
10. B. Håkansson, Danish Society for Nature Conservation, Copenhagen, Denmark.
11. V. Loeschcke, Dept of Biology, Genetics, Ecology and Evolution, Aarhus Univ., Aarhus, Denmark.