Community-Based Adaptation (CBA) implies a multi-stakeholders action, innovation and a process of social learning for adaptive livelihoods. Within this framework, Communication plays a key role to facilitate knowledge sharing, participation and to enhance rural institutions capacities to assist small farmers to face climate change challenges. The three case studies underline the importance of ComDev for CBA and in particular for natural resource management (NRM), disaster risk management (DRM), and livelihood adaptation. • Democratic republic of Congo: NRM is an important component for CCA and the CSDI is supporting the Rehabilitation Programme of the National Agricultural and Forestry Research System of the Democratic Republic of Congo through a communication Action Plan where the use of rural radios, participations of civil society and rehabilitation of extension systems play an important role.