Chestnut-winged Cuckoo (Clamator coromandus) is a close relative of our much-loved Pied Cuckoo.
Strongly migratory in nature, it breeds in Northeast India, East and Southeast Asia and migrates down to the southernmost parts of the Indian peninsula. Sri Lanka and Southeast Asia during winter. Birds that winter in the subcontinent are presumably those that breed in the Himalayan foothills and thereabouts.
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.