My five can and are all out at the same time at least daily.
Honestly though, I'm not in the same room. I have a bird room and I shut the door. If I am in the room with them, they fly on me and follow me around. I really can't do much of anything...although Babylon frequently flies out of the bird room and hangs with me while the other four are out playing.
All five are fully flighted. They have worked out the flock dynamics for the most part. They do interact and chase each other around once in a while, but it's part of the flock dynamics.
When I was a kid, I had horses. We used to let them out as a herd. New horses had to be watched until they worked out the "herd dynamics". Once that was worked out, they lived as a "herd". Parrots are different species and since we often keep them confined, it's a bit of a different situation.....but I do believe that if you give them latitude, if they have the ability to fly away from each other and they have some "flock sense" they will work out a lot of their flock issues....assuming you have the right species for the mix. I have all African birds....Three Senegals, a Timneh and a Congo grey (I understand these two greys are now considered different species) so although they are not necessarily "affectionate" towards each other (although some are...like Jack and Babylon) they can learn to get along as a flock.
I do think it's a tough thing to define, but it has to do with the "flock culture". I'm sure that subtle factors such as gender, age and how the animals are introduced as a flock all come into play....also, socialization to people and also to other birds is really important.
Also, I do keep an eye on them for the most part. I listen and check on them once in a while. I would NOT introduce a cockatiel into this flock because cockatiels are too gentle and could not stand up to my other birds.....actually, at this point, I am very reluctant to introduce any other bird into the flock....because it would probably upset the dynamics PLUS...just don't need another bird.
I think there is some risk, but in my opinion, with my flock the risk is outweighed by the benefit to their mental and physical health. They do fly around together...and even chasing each is other a form of "enrichment"....as long as it doesn't lead to serious aggression. I also really enjoy watching them interact. They are really funny. For example: Bailey Senegal will follow Kiri grey around and talk to her. He doesn't talk much in his cage but when he's out with Kiri....his wings go out and he has long, sincere conversations with her. She just looks at him and bats her eyes at him. It's hard to understand what he is saying because his voice is high pitched and a little mechanical but it is also musical and fun to listen to. I laugh every time.
Thx




