{"fact":"Crows remember who's reliable and who's not for at least a month, showing impressive social memory skills.","context":"Differential vocal responses to reliable and unreliable model individuals in the repeat phase also show that crows memorised reliability of model individuals for at least 1 month.","source":"Claudia A. F. Wascher; Friederike Hillemann; Daniela Canestrari; Vittorio Baglione, Carrion crows learn to discriminate between calls of reliable and unreliable conspecifics, 10.1007/s10071-015-0879-8","index":218}