Orcas living off Europe’s Iberian coast recently struck and sunk a yacht in the Strait of Gibraltar. Scientists suspect that this is the third vessel this subpopulation of killer whales has capsized since May 2020, when a female orca believed to be the originator of this behaviour suffered a traumatic encounter with a boat. In most reported cases, orcas are biting, bending and breaking off the rudders of sailboats. So how did they learn to imitate this behaviour – and why? We asked Dr Luke Rendell, who researches learning, behaviour and communication among marine mammals at the University of St Andrews.
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