{"fact":"Scrub-jays demonstrate an awareness of others' knowledge, re-hiding food if they were watched caching by a potential thief.","context":"When observed by potential pilferers at the time of caching, experienced jays that have been thieves themselves, take further protective action. Once the potential pilferers have left, they move caches those birds have seen, re-hiding them in new places.","source":"Nicola S Clayton; Joanna M Dally; Nathan J Emery, Social cognition by food-caching corvids. The western scrub-jay as a natural psychologist, 10.1098/rstb.2006.1992","index":289}