There was a hunter who lived on a large parcel of land, and every year when deer hunting season opened, he would go out the door, trudge into the woods behind his house, and bag a deer.
He noticed that, for some reason, on the exact day deer hunting season began, crows would just appear outside his house in the trees. The trees would be barren, but on that day, they would appear in flocks even before he left his house. As he gutted his deer, the crows would swarm it and feast on the gut pack.
This really puzzled him, as if they somehow knew exactly what date it was.
He figured out after a while that the crows were watching him through his windows in the days leading up to the season...bringing his gun out, cleaning and preparing it, getting all his gear together. And it somehow got communicated to all the other crows in the area that deer hunting day was here.
As for orcas...this video really highlights how smart they are. In this video, a penguin is being pursued by a pack of orcas who patiently try to cut it off, bit by bit, even going under the raft, until the penguin leaps out of the water with the orcas hot on his tail, and takes refuge inside their zodiac. The penguin then placidly walks on the edge, as the Orcas, only a few feet away looking at him, and he nearly seems to be taunting them!
What I found interesting is that those orcas could have easily made short business of those boats, but it is almost as if they knew that if they began messing with humans...their days would be numbered, so they just swam away to look for other prey!