They disperse widely and are known from islands such as the Lakshadweep in winter .
The southernmost populations are resident , but most other birds migrate south to winter in India , the Maldives , and southern Japan .
populations disperse widely and are known from islands such as the Lakshadweep in winter .
The southernmost populations are resident , but most other birds migrate south to winter in India , the Maldives , and southern Japan .