Confronted by Drones, Monkeys Warn Comrades of Incoming 'Eagle'

By George Dvorsky

Image: Julia Fischer

West African green monkey in Senegal.

Researchers in Senegal recently flew drones in the vicinity of green monkeys to see how the primates might respond. Incredibly, the monkeys produced an instinctual alarm call consistent with an eagle sighting. Kinda makes sense—except for the fact that green monkeys aren’t threatened by eagles.

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