More than 50 billion birds in the world

Updated May 18 2021 - 11:54am, first published 11:49am
An University of NSW study has estimated there are around 50 billion birds around the world.
An University of NSW study has estimated there are around 50 billion birds around the world.

More than 600,000 citizen scientists around the world have contributed to an Australian research project that's concluded there are roughly 50 billion birds in the world.

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