If one bird foraging in a flock on the ground suddenly takes off, all other birds will take off immediately after, before they even know what’s going on. The one who stays behind may be prey.

Quotern

If one bird foraging in a flock on the ground suddenly takes off, all other birds will take off immediately after, before they even know what’s going on. The one who stays behind may be prey.

-- Frans De Waal

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