{"fact":"Young crows sometimes make the same mistake as human babies, looking for a hidden treat in the last place they found it, even if they saw it moved somewhere else.","context":"The crows showed perseverative searches at a previously rewarded location (the so-called ‘A-not-B error’).","source":"Almut Hoffmann; Vanessa Rüttler; Andreas Nieder, Ontogeny of object permanence and object tracking in the carrion crow, Corvus corone, 10.1016/j.anbehav.2011.05.012","index":176}