Taylor, A. H., Cheke, L. G., Waismeyer, A., Meltzoff, A., Miller, R., Gopnik, A., et al. (2015). No conclusive evidence that corvids can create novel causal interventions. Proceedings of the Royal Society B: Biological Sciences, 282(1813): 20150796. doi:10.1098/rspb.2015.0796.