{"fact":"Crows are choosy about their caching strategy. They're more likely to stash away black walnuts and intact walnuts, saving the best for last.","context":"Type of walnut (black versus English), condition of shell (cracked versus intact) and time of day had the greatest effects on the likelihood of caching, such that black walnuts and intact walnuts were more likely to be cached, and the likelihood of caching increased with the number of minutes since first light.","source":"Daniel A. Cristol, American crows cache less preferred walnuts, 10.1006/anbe.2001.1748","index":99}