Gull-billed Tern (Gelochelidon nilotica) has a widespread breeding range that spans the Americas, Africa, coastal South Asia, Australia and temperate Eurasia. All populations move considerably post-breeding but the northern ones migrate long-distances to the south.
Populations in the Indian Subcontinent that breed in coastal waters are supplemented many fold during winter when migratory populations from the eastern parts of their temperate range visit.
Migration map
This animated migration map was created from observations uploaded to the citizen science platform eBird up until 2020. Where present, the inset graph depicts the seasonal likelihood of finding this species (i.e. the proportion of eBird checklists) within its range in India alone. We are grateful to the many birdwatchers around the world who have enabled the creation of this animation by sharing their observations on eBird.
The contents of this page are made available under a CC BY license 
Amur Falcon (Falco amurensis) breeds in northern China and eastern Russia (Amur) and is a true passage migrant in India on its way to southern Africa to spend the winter.
Arctic Warbler (Phylloscopus borealis) breeds across the northern Eurasian taiga and migrates to Southeast Asia and the Andaman and Nicobar Islands during winter.
Ashy Drongo (Dicrurus leucophaeus) breeds in the Himalayas and in parts of central India and migrates to lower altitudes and latitudes during winter.