immediately apply it to every member of a species, as if there are no individuals. Not all animals or birds act like all other members of their species.
Case in point: A few years ago I read something about chickadees in which the author said when around a feeder, one bird will dominate, chasing others off the feeder until he leaves and they can come get their share. The way he wrote it seemed to say all chickadees do this. Take a look at that picture. Four of them visible on the feeder at one time. I have seen that more often than not. For sure sometimes one bird will chase another off but just as often more than one will be there at the same time.
There may be another aspect of what seems to be dominant behavior, like when one bird flies in and another takes off. I have seen this in gulls around harbors. One gull stands atop a piling. A second gull approaches for a landing and the first gull takes off. Rather than dominant/submissive behavior, this is probably a simple function in physics. The gull flying in has the weight and momentum to knock the first gull off the piling, so the first gull takes off, knowing full well he can't withstand a collision on such tiny platform. I've seen chickadees and other birds for that matter do the same thing.
On a step outdoors today I noticed the feeder was getting low. I had packed in 25 pounds of sunflower seeds for just that purpose. Later I went out and noticed there weren't any chickadees in sight so I figured it was a perfect time to take the feeder in and fill it, which I did.
When I brought it back out there still wewe no birds in sight. I said out loud, "Here you go guys, meat." It's only five steps from the feeder to the door but before I got there a whole cloud of chickadees had descended from somewhere to the feeder. Chickadee telegraph?
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