Mechanisms of what-where-when memory in black-capped chickadees (Poecile atricapillus): do chickadees remember "when"?
Journal of Comparative Psychology (2011) - Comment
pubmed: 21639614  doi: 10.1037/a0023635  issn: 1939-2087  issn: 0735-7036 

Miranda C. Feeney, William A. Roberts, David F. Sherry