- CMS is an international treaty concluded under aegis of United Nations Environment Programme (UNEP), concerned with conservation of wildlife and habitats on a global scale.
- It is commonly abbreviated as Convention on Migratory Species (CMS) or the Bonn Convention.
- CMS aims to conserve terrestrial, marine and avian migratory species throughout their range.
- It was signed in 1979 in Bonn (hence the name), Germany and entered into force in 1983.
- Its headquarters are in Bonn, Germany.
- Since its entry into force, its membership has grown steadily to include over 120 Parties from Africa, Central and South America, Asia, Europe and Oceania.
- CMS is only global and UN-based intergovernmental organization established exclusively for conservation and management of terrestrial, aquatic and avian migratory species throughout their range.