3 birds together

[lwis]

How does having three birds of the same species work (or any species really)? I mean, does one of them end up being a third wheel, or do they all just hang out? Is there often issues with two of them pair bonding and the other being left out? I know most parrots live in large flocks, so obviously they would have to get along with more than one bird, but living in a house is much different, I am just wondering how the dynamics work. I know everyone's story is different and I don't want to generalize. I am just curious.