Hi Gary, Amy, and Ria!!
Thank you all for the good suggestions!!!
I used to joke with my husband that I was just going to get some really big bird to keep Beaker in line, but I don't want him to be unhappy either
I guess I'm afraid if I get another bird to put with him and it does not work out, I'm going to run out of room and end up making the other birds unhappy by having another 3rd wheel. Hubby will kick my butt if I buy another giant cage too.
Right now, they are all in a double flight - and Beaker is all by his lonesome in the bottom. Azul, Bonzo (male zebra) and Thurston (female owl) are in the top.
I have some plastic plants and hiding places. And multiple water and food sources. At first I tried to acclimate everyone by taking all the stuff out and rearranging it. I've tried that with Beaker several times and he still acts like a turd (can I say that here

?). I also removed the nests - I read that they don't need them for sleeping.
When Beaker and Azul were together, they slept together in the nest. In fact, they seemed to really enjoy putting hay into the nest and I felt since they didn't seem to 'play' it was a good activity for them. Beaker's current favorite pastime is scolding at that 'other' bird in the mirror. I put hay in for him to build his own nest b/c I feel like he is bored. However, he has taken to sleeping in his 'tidy-seed' food dispenser instead of the nest. Which is gross, because his food is super-poopy and requires more maintenance. I would like for him not to sleep there - and guessing only if I remove it and put food in another way to force him to stop - he still might sleep in another food dish I guess or go back to it if I put it back on the cage.
In the top cage, only Thurston sleeps in the nest. I decided to put another nest in the cage this week since it is so cold and also see if it might cut down on the aggression. Bonzo and Azul both sleep on branches outside nests.
I was worried about Thurston and Bonzo mating. I figured she was ok with just Azul since he is an African finch. I've never seen any hanky panky but I'm not watching them all the time either. I decided I would just throw out her eggs. But guess what? I don't have to do anything, because it seems we have a mysterious EGG tosser in the bunch. I thought the most likely candidate is Azul. But I've never seen them do it! Can anyone suggest how to catch them in the act? I don't know what time of day is most favorable for egg tossing.
I still can't believe I've never seen them do it because it looks like it would take some work with the shape of that nest - it's a little cavity nest, not one of the open top ones.
Gary - I think from what you're saying I need to stick with 2 in a flight. The cage calculator says 1-2 birds for the ones I have now- which look huge to me, but if things don't go well, I would have more birds in a smaller space with increased potential for more squabbling.
I think I will look for a hen and keep her separate for a while, then try out how she and Azul do together and let Beaker take another cage on his own.
Whew! Sorry for rambling on! I'm posting a pic of the top half so you can get an idea.
thanks again everyone and hope everyone's enjoying the weekend!!
Wendy