| Service public de Wallonie | Belgium |
| Natuurpunt | Belgium |
| Terra Cypria - the Cyprus Conservation Foundation | Cyprus |
| Správa Krkonošského národního parku (Krkonose Mountains National Park) | Czech Republic |
| Landesumweltamt Brandenburg | Germany |
| Lliga Per a la Defensa Del Patrimoni Natural (DEPANA) | Spain |
| Generalitat de Catalunya Servei de Planificació i Gestió de l’Entorn Natural (Catalan Government Planning & Management Service) | Spain |
| Fundació Catalunya - La Pedrera, Àrea de Territori i Medi Ambient | Spain |
| Xarxa de Custòdia del Territori (Land Stewardship Network (of Catalonia) | Spain |
| Conselleria de Medi Ambient, Aigua, Urbanisme i Habitatge (Ministry of Environment, Water, Urban Development & Housing) | Spain |
| Govern Balaer, Servei de Biodiversitat | Spain |
| Metsähallitus (Natural Heritage Services of Metsähallitus) | Finland |
| Turun kaupunki (City of Turku: Environmental and City Planning and Real Estate Departments) | Finland |
| Conseil Général de la Gironde | France |
| Agence des aires marines protégées | France |
| Office de l'Environnement de la Corse | France |
| Office National des Forets | France |
| Espaces Naturels Régionaux (Natural regional areas) | France |
| Syndicat Mixte Baie de Somme, Grand Littoral Picard | France |
| Parc Naturel Regional des Marais du Cotentin et du Bessin | France |
| Parcs Nationaux de France | France |
| Eden 62 | France |
| Conservatoire de l'Espace Littoral et des Rivages Lacustres | France |
| ATEN (Atelier Technique des Espaces Naturels) | France |
| Tour du Valat - Centre de recherche pour la conservation des zones humides méditerranéennes | France |
| Reserves Naturelles de France | France |
| Management Body of Samaria (White Mountains) National Park | Greece |
| Natural History Museum of the Lesvos Petrified Forest | Greece |
| Hunting Federation of Macedonia & Thrace (KOMATH) | Greece |
| Foreas Diaxeirisis Delta Axioy Loudia Aliakmona (Axios Loudias Aliakmonas Management Authority) | Greece |
| Laboratory of Marine Sciences, University of Piraeus | Greece |
| Zumberak - Samoborsko Gorje Nature Park | Croatia |
| Környezetvédelmi és Vízügyi Minisztérium (Ministry of Environment and Water, Hungary) | Hungary |
| Pro Vertes Public Foundation | Hungary |
| National Parks and Wildlife Service | Ireland |
| WWF Oasi (WWF Oasis) | Italy |
| Lietuvos gamtos fondas (Lithuanian Fund for Nature) | Lithuania |
| Administration de la nature et des forêts | Luxembourg |
| De12Landschappen | Netherlands |
| Ibumana | Netherlands |
| Crossbill Guides Foundation | Netherlands |
| Staatsbosbeheer (State agency for forest and nature management) | Netherlands |
| Foundation for Restoring European Ecosystems (FREE Nature) | Netherlands |
| Natuurmonumenten (Society for Preservation of Nature Monuments) | Netherlands |
| Brabants Landschap | Netherlands |
| European Centre for Nature Conservation (ECNC) | Netherlands |
| Stiftelsen iNasjonalparker | Norway |
| Halti National Park Centre | Norway |
| Kampinoski Park Narodowy (Kampinos National Park) | Poland |
| Stowarzyszenie na Rzecz Wybrzeża (Society for the Coast) | Poland |
| Administraţia Rezervaţiei Biosferei Delta Dunării (Danube Delta Biosphere Reserve Authority) | Romania |
| Vanatori Neamt Natural Park | Romania |
| Swedish Environmental Protection Agency | Sweden |
| Institute of the Republic of Slovenia for Nature Conservation | Slovenia |
| Forest Enterprise Scotland | United Kingdom |
| A Rocha International | United Kingdom |
| Natural England | United Kingdom |
| Natural Resources Wales | United Kingdom |
| The Wildlife Trusts | United Kingdom |
| The Conservation Volunteers (TCV) | United Kingdom |
| Scottish Natural Heritage | United Kingdom |
| Conservation Management System Consortium | United Kingdom |
The Danube Delta Biosphere Reserve Authority is tasked with the conservation of the biodiversity of the Danube Delta, sustainable use of the natural resources, wetlands restoration, cross-border cooperation, local community involvement, public awareness and ecological education.