This video follows a course on tree species identification for leaders of seven clans from Madang Province, Papua New Guinea. The participants explain the value of the forest in the own words, showing how each clan has distinct uses and names for trees. The video contrasts the local knowledge with scientific knowledge, demonstrating how these can be combined to support community-based forest monitoring and management. The course was organised by the Foundation for People and Community Development and the Institute for Global Environmental Strategies (IGES), as part of the Community Carbon Accounting research. A representative of IGES explains the threats that face the communities and their forests, and the opportunities presented by the course.