The West Africa Biodiversity and Climate Change (WA BiCC) program and its partners sought to reduce deforestation, forest degradation, and biodiversity loss by promoting collaborative management of three transboundary forest landscapes in the Upper Guinean Forest: Ziama-Wonegizi-Wologizi (ZWW) Transboundary Forest Landscape in Liberia and Guinea, the Gola Transboundary Forest Landscape in Sierra Leone and Liberia, and Taï-Grebo-Krahn-Sapo (TGKS) Forest Landscape located in Liberia and Cote d’Ivoire. This brief summarizes lessons learned from WA BiCC’s experience strengthening bilateral collaboration, learning, and adaptation in these three transboundary forest landscapes.