Yesterday, I had the
caiques out as I was cooking dinner. They were making aggressive postures towards each other, which I was attempting to capture. Here you can see they are on separate stands, but neither is calm!

Close-ups. Here's Calypso, in a begging pose. What does he want? To attack Beeps!

And here's Beeps. His feathers are slightly raised, including his wings from his body, he's standing with his feet apart, and his eyes are starting to flash red. In other words, watch out!

A few seconds later, I was taking another picture of posturing, but got a picture of a fight instead:

No one was injured, and of course I separated them in less than a second. I would not have stood around taking pictures of a fight -- this happened instantaneously -- they were about a foot away from each other when I started taking the picture.
By the way, that's Beeps on top. I suspect he was the aggressor, but with all of the body language flashing back and forth, it's entirely possible Calypso egged him on in silent
caique-speak. No one is innocent in this melee!
Surprisingly, after this interaction, we still had a calm evening.