Independent, practical research, advice and consultancy for people and wildlife. Employs about 140 people, working in projects in ecology, nature, landscape and environment. Founded by Hans Waardenburg in 1979. Departments: - Aquatic ecology - Nature and landscaping - Bird ecology Activities: - Research surveys and monitoring - Strategy, planning and design - Nature conservation and management - Impact assessment studies - Environmental laws and regulations - Courses, training - Underwater research by scuba divers - Photography and filming (aerial, underwater and remote) Board of directors: - Martien Meijer - Wouter Lengkeek - Eelco Waardenburg