I was returning from an errand at lunchtime today to my workplace when a flock of starlings caught my eye. I admired how they moved as one, although there seemed to be a small fringe flock that didn't quite assimilate into the bigger flock. Teenagers maybe? :)
Then, suddenly, the entire flock took a dive. And there was not a bit of individual dissent about it; they all just dove. Then I saw an accipiter, probably a sharp shinned hawk, fly into the midst of the flock. I could not tell if the hawk was successful in obtaining a starling meal, I just saw the flock make an abrupt retreat in unison.
Wow. The timing also amazes me, since I rarely if ever witness stuff like this at the feeder at work.
Also this day I heard a great horned owl hooting just before dawn, saw not one but two pileated woodpeckers flying, and spotted a red tailed hawk on my drive home, way off in a pasture where she/he was just a hint of white. Birds are amazing.
I am currently reading "Mind of the Raven" by Bernd Heinrich. All the more evidence that birds know more than we give them credit for.