“…However, by studying food caching (Clayton & Dickinson, 1998), food finding (Babb & Crystal, 2006), fear conditioning (O'Brien & Sutherland, 2007), and object exploration , researchers claim to have demonstrated a form of episodic memory in scrub jays (Clayton & Dickinson, 1998), pigeons (Zentall et al, 2001), mice (Dere et al, 2005), rats O'Brien & Sutherland, 2007), gorillas (Schwartz & Evans, 2001), rhesus monkeys (Hoffman et al, 2009), and chimpanzees/bonobos (Menzel, 1999;Martin-Ordas et al, 2010).…”