If You have not heard this bird sing You have heard nothing ...

As per Wiki - The Malabar Whistling Thrush is a whistling thrush in the family Muscicapidae. They are also known locally by the name of whistling schoolboy for the whistling calls that they make at dawn that have a very human quality. The species is a resident in the Western Ghats and associated hills of peninsular India including central India and parts of the Eastern Ghats.

This large thrush appears blackish with shiny patches of blue on the forehead and shoulders. The blue becomes visible only in oblique lighting. The bill and legs are black. The sexes are indistinguishable and juveniles are more brownish and lack the blue forehead.

The male sings its varied and melodious whistling song from trees during summer. They may sing for a long time around dawn but at other times of the day they often utter sharp single or two note whistles. They were once popular as cage birds, with the ability to learn entire tunes. ....