I thought this from the article was the most impressive:
In the experiment, described in Current Biology, the rooks proved highly accurate, placing in only the precise number of stones needed to raise the water level to a reachable height. Instead of trying to get the worm after each stone was dropped, they apparently estimated the number required from the outset and waited until the time was right [LiveScience]
But in the video, I see the rook checking after each rock if it can reach the worm yet.
Comments
I thought this from the article was the most impressive:
In the experiment, described in Current Biology, the rooks proved highly accurate, placing in only the precise number of stones needed to raise the water level to a reachable height. Instead of trying to get the worm after each stone was dropped, they apparently estimated the number required from the outset and waited until the time was right [LiveScience]
But in the video, I see the rook checking after each rock if it can reach the worm yet.