Great idea starting a topic about this! I like to read how others' budgies are reacting to one another as well because every night I am still fixated on Jerry and Winston's behavior towards one another as they tend to be very hot/cold with each other. I try to watch for triggers and anything that may set them off one way or another.
Last night was odd. BUT, recently there was a full moon and I do think that affects their moods (ours too!) AND Jerry has been hormonal this past week (humping his boing while holding a toy in his foot - not even a shiny toy, I replaced the bell for a dried pasta toy thinking that wouldn't get him excited, didn't even matter!).
Back to last night though - he and Winston did play happily together quite a bit, but Jerry also did something strange that I haven't seen him do. Winston would be sitting on the gym and Jerry would fly over near him. Jerry would then hop closer to him, within an inch or two. And then all of a sudden he would jump right into Winston, right at him! I wasn't sure what to make of it, it didn't seem utterly aggressive and out of anger, but at the same time it was pretty darn rude! He did this multiple times, and of course Winston screeched and took off. I also thought that maybe it was Jerry's way of getting a game of tag started. Winston didn't seem upset about it in the minutes after, he sought out Jerry to play many times last night.
This is always why I'm wondering if their "playing/fighting" is normal behavior. I don't feel like their safety is in danger, and they do clearly enjoy beaking each others' beaks and singing into each others' faces. Maybe they're just two boys who like to rough-house
My two really do seem to need their space. Judging from how they react and play and squabble with each other now, I don't feel confident that they could live together unless I had a HUGE flight cage. Jerry's cage is big, but I don't think it's big enough to make those getaways when someone doesn't want to play. And they both seem to like their alone time in their cages after a long play/fly session and they settle in for the night.
Regarding going into each other's cages at this point, Jerry doesn't care one bit, he thinks it's rather amusing. But Winston does not seem to like Jerry *that* close to him when in closed quarters. Anytime that Jerry will try to approach him in either his cage or Jerry's, he gets anxious and makes a quick getaway and flies out.