{"fact":"New Caledonian crows display impressive tool-using skills, selecting and using sticks of different lengths in the correct sequence to retrieve a food reward, a feat not observed in any other species.","context":"In one set of studies, they successfully chose a series of sticks of varying lengths in the order required to obtain a trapped food reward… If the crow was capable of planning, it would be expected to observe the setting and then proceed by first reaching into the cage with the short stick, using that to reach the long stick, and finally using the long stick to reach the food.","source":"Irina Meketa, A critique of the principle of cognitive simplicity in comparative cognition, 10.1007/s10539-014-9429-z","index":408}