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NOTE: YouTube may include advertisements on this video. PLOS has not monetized its channel and is not receiving any income from these ads. For an ad-free version of this video visit ============= Using the Aesop’s Fable paradigm to investigate causal understanding of water displacement by New Caledonian crows: Example trials for each of the six experiments. For more information: Jelbert SA, Taylor AH, Cheke LG, Clayton NS, Gray RD (2014) Using the Aesop’s Fable Paradigm to Investigate Causal Understanding of Water Displacement by New Caledonian Crows. PLoS ONE 9(3): e92895. doi: