This is fascinating behavior. Do you have a link with more details. I had no idea that cows deliberately hunted grubs. I wonder if it is a regional herd "cultural" behavior or common to cows worldwide?
If you watch, the older crow is making large vertical head movements, and if you really crank the volume, you can hear part of the sound it is making.
The rest isn't in a hearable frequency.
They noticed me watching, and the older crow didn't immediately believe the younger, more excitable crow when it called an alert, but you can see him walk over and react when he sees me.
More than anything, he seems mad. :P
I have a relationship with crows here, for a variety of reasons, suffice it to say, the older crow knows I am not a real threat.
Something to be wary of, but not a real threat.
But, would you tell a child, when seeing a tiger, not to be worried? Even if you knew that particular tiger wasn't a threat?
Anyhow, after I googled, and yup... ultrasonic hunting.
(And as buddy said, crows, not cows)
Yeah video quality sucks, I couldn't get closer, just grabbed my phone, did what I could to record it.
The video is set private-- too bad, I'd love to see it.
We spend a lot of time watching the deer here and they have a multitude of extremely complex social behaviors. It's very obvious that the adults teach the children foraging patterns.
Including things like the descendants of a particular line of does knows how to direct their fawns into our fenced off courtyard where the adults can't fit and there are plenty of delicious planets-- but other deer don't do that with their fawns, presumably due to not having had the experience themselves as fawns.
