I read this in a new Almanac , it explained how crows can get you bait of fish when ice fishing.
The crow will come up to a untended line and grab the line and walk of ways and then put its foot down pinning the line to the ice then it walks on the line back to the ice hole and repeats this until he has your bait or fish. I think this is just amazing and just continues to prove how smart crows are.