- R&D Seismology and Acoustics [The Netherlands]
- RIKEN - Institute of Physical and Chemical Research [Japon]
- RMIT University
- RSPB Centre for Conservation Science
- Radboud University [Nijmegen]
- Raptor View Research Institute
- Real Jardín Botánico de Madrid
- Red Sea Research Centre
- Redpath Museum and Department of Biology
- Reel Time Gaming [Australia]
- Reese Institute for Conservation of Natural Resources [North Carolina
- Research Department
- Research Department [Australia]
- Research Group of Plant and Vegetation Ecology
- Research Institute for Nature and Forest
- Rhodes University, Grahamstown
- Risques, Ecosystèmes, Vulnérabilité, Environnement, Résilience
- RiverLy - Fonctionnement des hydrosystèmes
- Romanian Academy
- Romanian Academy of Sciences
- Rothamsted Research North Wyke
- Royal Belgian Institute for Natural Sciences [Belgium]
- Royal Botanic Garden [Edinburgh]
- Royal Netherlands Institute for Sea Research
- Royal Netherlands Meteorological Institute
- Royal Society for the Protection of Birds
- Ruhr University Bochum = Ruhr-Universität Bochum
- Russian Academy of Agricultural Sciences
- Russian Academy of Sciences [Moscow]
- Russian Federal Service for Hydrometeorology and Environmental Monitoring
- Réserve Naturelle Nationale de Chérine
- Réserve Naturelle Nationale de Moëze-Oléron
- Réserve Naturelle Nationale des TAF
- Réserve Naturelle Nationale des Terres Australes Françaises
- Réserve Naturelle Régionale du Bocage des Antonins [France]
- Réserve Naturelle de Lilleau des Niges [17880 Portes-en-Ré]
- Réserve naturelle du marais d’Yves
- Réserves Naturelles de France