Reasoning by exclusion in New Caledonian crows (Corvus moneduloides) cannot be explained by avoidance of empty containers
Journal of Comparative Psychology (2015) - Comment
pubmed: 26010196  doi: 10.1037/a0039313  issn: 1939-2087  issn: 0735-7036 

Sarah A. Jelbert, Alex H. Taylor, Russell D. Gray