Causal understanding of water displacement by a crow?

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.

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:10.1371/journal.pone.0092895
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