{"fact":"Crows exhibit a sense of fairness!  They are less likely to cooperate in an exchange task if they see a partner receiving a better reward for the same effort.","context":"Additionally, corvids respond behaviourally to inequity in reward distribution and working effort. Subjects decreased their own exchange per-formance when an experimental partner received a more preferred reward than they did, or if the experimental partner received the reward as a ‘gift’, whilst the focal individual had to ‘work’ for it.","source":"Claudia A.F. Wascher, Individual performance in socio-cognitive tasks predicts social behaviour in carrion crows, 10.1163/1568539x-00003245","index":168}