Collaboration across environmental agreements is key for migratory species conservation

National Biodiversity Strategy and Action Plans (NBSAPs) are the main instrument for Parties to the Convention on Biological Diversity to develop and report on their implementation of the Convention. They promote the synergies between various other multilateral environmental agreements, including the Convention on the Conservation of Migratory Species of Wild Animals (CMS). Strengthening synergies between different Conventions can enhance collaboration, knowledge sharing, and implementation - ultimately accelerate progress towards global biodiversity goals. Here, we present a systematic review of revised NBSAPs submitted since the 15th CBD Conference of Parties to assess the integration of migratory species and the alignment between the CMS within the NBSAPs. We find an emerging direction towards establishing ecological corridors and integrating spatial planning for migratory species conservation, as well as increased actions towards reducing bycatch for marine migrants. Overall, while we find that explicit attention to migratory species in these documents remains limited, NBSAPs represent a tool for countries to incorporate relevant conservation actions that benefit these species. These findings underscore the need for stronger, cross-target integration of migratory species within NBSAPs to enhance policy coherence and complement CMS commitments.