How many wild birds are alive on Earth?

Q: How many wild birds are alive on Earth?

50 billion birds (50,000,000,000). About six birds per human. House sparrows alone number 1.6 billion. Source: PNAS, 2021

50 billion

birds

50,000,000,000 exactly, give or take

About six birds per human. House sparrows alone number 1.6 billion.SOURCEPNAS, 2021

Scale check: 50 billion is roughly more than everyone alive today.

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