{"fact":"Crows take their time hiding their treasured treats. They spend more time caching English walnuts than black walnuts, suggesting they value them more.","context":"Crows spent more time caching each English walnut than they did each black walnut (English: X=154  118 s; black: X=98  91 s; unpaired t test: t134=3.0, P=0.004).","source":"Daniel A. Cristol, American crows cache less preferred walnuts, 10.1006/anbe.2001.1748","index":100}