Increasing light levels at dawn trigger singing activity in birds

By singing at dawn, birds avoid acoustic interference from 'other sympatric callers such as cicadas and frogs

By calling at dawn, the bird community can maximize its fitness relative to the frog&nbsp;

Atmospheric conditions for transmission of birdsongs are optimal at dawn

The dawn chorus of singing birds is a very striking and widespread phenomenon. Which is plausible explanation is not  possible is the following options for the evolution of the dawn chorus of birds?

The dawn chorus of singing birds is a very striking and widespread phenomenon. Which is plausible explanation is not possible is the following options for the evolution of the dawn chorus of birds?

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M.Sc. Entrance

CSIR NET

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