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Top / Fri, 30 Oct 2026 BBC

Giant eagles once ruled the skies. They snatched human children, and shaped our evolution

Unlike pursuit predators – such as lions or wolves, which actively chase their prey, raptors are often ambush predators. They are stealthy and, in the case of crowned eagles, hide in the trees until the moment is right. This indicates human tendency towards sociality may have been driven by the need to evade predatory birds in particular, so multiple people can keep watch for a surprise attack – known as the "many eyes effect".

Unlike pursuit predators – such as lions or wolves, which actively chase their prey, raptors are often ambush predators. They are stealthy and, in the case of crowned eagles, hide in the trees until the moment is right. This indicates human tendency towards sociality may have been driven by the need to evade predatory birds in particular, so multiple people can keep watch for a surprise attack – known as the "many eyes effect".

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