Fascinating, Shad. To my ears, the general alarm call sounds much like the egg song. I have a video of what I think you are calling the warning call. When the warning call is sounded, they all (mostly?) go perfectly still. You could hear a pin drop! I’ll try to find an upload and you can say whether you agree. The aerial call is super obvious and if I attempt it, they run for cover. I’m not sure of the ground predator call, unless it’s continuous deep clucking?You may recall I've split the calls up for predators into two main calls, one for aerial and one for ground. Then there is the warning call, this is quiet and meant to be heard by the tribe. After the warning call has been given you get what I call the general alarm call; it's this that everyone hears but it isn't the warning call.
It gets more complicated. Each chicken has a different voice. The warning call from say Cillin is not quite the same as the same call from Punch. This gets interesting when there are cockerels around, some of which give the warning call for anything that moves it seems at times. The adult hens know who is giving the call and adjust their reaction to it. If Mag from Tribe 2 gives a warning call all the tribe hens pay attention and head for cover. If the new unnamed cockerel gives the warning call the hens will make a judgement, the less experienced ones usually heading for cover while the more senior may decide that the threat isn't imminent, or may not exist at all.
This why it is often more informative to look at the rest of the flock than it is to look at the most obvious which is the bird that gave the call. It's the reaction of the rest of the flock that often lets one know what a call means.