Yes, this is the phrase chickens use to announce that something is upsetting them, usually a sudden disturbance.
If you listen closely, you will notice that chickens speak in sentences. They actually have syntax, stringing several notes together with different inflections to form different phrases that mean different, but specific things. All birds have this, best demonstrated by parrots who can actually communicate with us using our own language and syntax.
I've learned several of their phrases, and several weeks ago, it proved extremely useful. I was inside the pen, making repairs, when the rooster, then several hens, vocalized the phrase that means: an unfamiliar animal is approaching. It was the same phrase as, here comes the squirrel, or here comes the deer, but this was in a very sinister, low-key tone.
I got up and went to investigate. As I was coming out of the pen, I saw a black bear sow not ten feet away. When she saw me, she charged. I had just time enough to back into the pen and slam the gate as she crashed against the fence. I slammed my palms against the fence and hollered at her to get away! She was so intent on the chickens, I think this was the first she noticed the human in the picture, and she ran off.
But she was only regrouping. I ran into the house for the shotgun as she circled the house, remaining just out of shooting range.
Then she charged the pen again. This time she was targeting the rooster who had retreated into his pen, but the gate was open and he was vulnerable. I didn't have time to raise and sight the gun, just fired a round for effect to distract the bear. She ran off, but circled around again, settling under a pine some distance away. I took advantage of the lull in the action to call in the game officers, who arrived twenty minutes later to get the situation in hand.
It pays to learn chicken language. It might come in handy some day.
