{"fact":"Crows are masters of deception.  Some create fake caches filled with inedible items to trick potential thieves.","context":"Some corvids return alone to caches they had hidden in the presence of conspecifics, and readily recache them in new places unbeknown to the potential thief (e.g. jays, Emery & Clayton 2001; ravens, Heinrich 1999).","source":"Nathan J Emery, Cognitive ornithology: the evolution of avian intelligence, 10.1098/rstb.2005.1736","index":363}