Central Asian Flyway

The Central Asian Flyway (CAF) is one of the world's nine recognized major bird migration corridors, encompassing the overlapping migratory routes of waterbirds and other species between their northern breeding grounds in the Arctic tundra and western Siberia and their wintering grounds in South Asia and the Indian Ocean archipelago. The flyway concept itself has no single founding treaty; it is an ecological framework adopted by the Convention on the Conservation of Migratory Species of Wild Animals (CMS, also called the Bonn Convention), which entered into force in 1983 and to which India is a party. The CAF spans 30 range states stretching from the Russian Federation across Kazakhstan, Uzbekistan, Turkmenistan, Afghanistan, Pakistan, Iran, the Gulf states, and the Indian subcontinent to the Maldives. A dedicated multilateral framework for the CAF has been pursued under CMS Resolution mechanisms since the early 2000s, building on the precedent of the legally binding African-Eurasian Migratory Waterbird Agreement (AEWA) concluded under CMS in 1995.

The conservation mechanics of the CAF operate primarily through soft-law coordination rather than a single binding instrument. The Conference of the Parties (COP) to CMS adopts the framework and action plans; range states are then expected to designate and protect key sites along the corridor, conduct synchronized waterbird counts, regulate hunting, and report on population trends. Site-level protection is delivered through complementary instruments: Ramsar Convention wetland listings, national protected-area designations, and the Important Bird and Biodiversity Area (IBA) network maintained by BirdLife International. The Wetlands International International Waterbird Census provides the population baselines against which favourable conservation status is judged. Each range state retains sovereign discretion over implementation, which distinguishes the CAF from the legally binding AEWA covering the adjacent Atlantic and African corridors.

Beyond the institutional architecture, the CAF is defined by its physical geography. Migratory waterbirds funnel southward each autumn through the Central Asian deserts and over the Hindu Kush and Himalayan ranges—some species crossing at altitudes exceeding 8,000 metres, as the bar-headed goose famously does—to winter on the wetlands of the Gangetic plain, the Rann of Kutch, coastal estuaries, and Sri Lankan lagoons. Flagship species using the corridor include the Siberian crane (now functionally extinct on its western and central routes), the bar-headed goose, the demoiselle crane that congregates at Khichan in Rajasthan, lesser flamingos, and numerous shorebirds and ducks. The flyway's wetlands also overlap with national waterbird habitats such as Chilika Lake, Keoladeo National Park, and Pulicat Lake.

India has positioned itself as the institutional anchor of the CAF in recent years. At the thirteenth CMS Conference of the Parties (COP13) held at Gandhinagar, Gujarat, in February 2020—the first CMS COP hosted by India—the Gandhinagar Declaration was adopted and India signalled its intent to lead CAF coordination. In 2023 the Government of India, through the Ministry of Environment, Forest and Climate Change, announced the establishment of a CAF coordinating unit, and the National Action Plan for Conservation of Migratory Birds along the Central Asian Flyway (2018–2023) provided the domestic policy spine. India had earlier signed CMS memoranda of understanding on the Siberian crane (1998) and on raptors and the dugong. The Wildlife Institute of India in Dehradun supplies much of the supporting research.

The CAF must be distinguished from the adjacent East Asian–Australasian Flyway (EAAF), which runs down the Pacific rim from the Arctic through East and Southeast Asia to Australia and New Zealand and is coordinated through the East Asian–Australasian Flyway Partnership, a separate voluntary network established in 2006. It is equally distinct from the AEWA region to the west. These three frameworks overlap at their margins—some species use more than one—but each has its own institutional home. A further distinction is conceptual: the "flyway" is a population-level ecological abstraction encompassing many individual species' routes, not a single corridor used by one species, which separates it from the species-specific MOUs that CMS also administers.

The CAF faces acute conservation pressures and unresolved governance debates. The absence of a binding regional agreement comparable to AEWA remains the central controversy; negotiations toward a formal CAF instrument have repeatedly stalled because several range states preferred a non-binding action-plan approach. Habitat loss from wetland drainage and the desiccation of the Aral Sea, illegal hunting and trapping along the Iranian and Pakistani coasts, collision and electrocution on power lines, and the encroachment of infrastructure on staging wetlands all degrade the corridor. The collapse of the western Siberian crane population, with the last wild bird recorded at Keoladeo in the early 2000s, is the starkest illustration of failure. Avian influenza outbreaks and climate-driven shifts in wetland hydrology compound the risks.

For the working practitioner—the environment-desk diplomat, the UPSC aspirant addressing GS Paper III, or the protected-area manager—the CAF is significant as a test case in transboundary environmental cooperation where India has assumed a coordinating role rather than a follower's posture. It links domestic instruments such as the Wildlife (Protection) Act, 1972, and Ramsar site management to a continent-spanning diplomatic framework. Understanding the CAF requires holding together three layers: the ecological reality of migration, the soft-law CMS framework that governs it, and the national action plans through which states deliver outcomes. Its trajectory will indicate whether voluntary flyway governance can match the binding AEWA model, a question that bears directly on the conservation of species that recognize no border.