- Spanish Ornithological Society (SEO/BirdLife)
- Royal Society for the Protection of Birds (RSPB)
- Hellenic Ornithological Society (HOS)
- Czech Society for Ornithology (CSO)
- European Union Action to Fight Environmental Crime (EFFACE)
- European Justice Programme
- European Union’s Judicial Cooperation Unit (Eurojust)
- Traffic
- Convention on the Conservation of Migratory Species of Wild Animals (CMS)
- Convention on the Conservation of European Wildlife and Natural Habitats (Bern Convention)
