…putting stones into a pitcher to raise the water level to be able to drink it ?
It is not a fable , it is fact …
Now a study published in Current Biology reveals that rooks, a relative of crows, do just the same when presented with a similar situation.
story with video here.
Cool. The other vids of the rooks picking the right rock(s) to use as tools were also interesting.
Crows are also smart enough to use technology.
In Japan, crows have been seen putting nuts on the crosswalks of intersections during red lights, letting cars drive over the nuts, and then eating them.
Crows are using motorists as their personal nutcrackers!