- UFZ (DE)
- Naturalis (NL)
- De Vlinderstichting (NL)
- UKCEH (UK)
- Butterfly Conservation Europe (NL)
- Butterfly Conservation - UK
- Centre for Ecological Research (HU)
- CREA-AA (IT)
- Creaf, UAB (ES)
- EIS European Invertebrate Survey (NL)
- University of Helsinki (FI)
- Université Libre de Bruxelles (BE)
- University of Alicante (ES)
- University of Lund (SE)
- University of Mons (BE)
- University of Novi Sad (RS)
- University of Reading (UK)
- University of The Aegean (GR)
- Senckenberg (DE)
- Finnish Museum of Natural History (FI)
- Entomologischer Verein
Krefeld e.V. 1905 (DE) - Research Institute Nature and Forest (INBO)(BE)
- National Biodiversity Data Centre (NBDC)(IE)
- Luxembourg Institute of Science and Technology (LIST) (LU)
- Aarhus University (DK)
- University of Coimbra (PT)
- Sorbonne University, Paris (FR)
- University of Innsbruck, Department of Ecology (A)
- viel-falter (AT)
- Environment & Resources Authority (ERA) (MT)
- Croatian Natural History Museum
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