1. A. Rutten, (https://orcid.org/0000-0002-4025-5265) ✉ (anneleen.rutten@uantwerpen.be)
2. K. Cox, Res. Inst. for Nature and Forest (INBO), Geraardsbergen, Belgium.
3. AR, T. Scheppers (https://orcid.org/0000-0002-5098-9326)
4. B. Vanden Broecke and H. Leirs, Dept of Biology, Univ. of Antwerp, Universiteitsplein 1, BE-2610 Antwerp, Belgium.
5. J. Casaer, Res. Inst. for Nature and Forest (INBO), Brussels, Belgium.