Good Question: is it macaw-proof?
Those look very cool ChristaNL. Does anyone know if aluminum is strong enough for Macaw beaks?
I am not worried about the aluminium- just use the extra bulky ones, but most of the builders just rivet the mesh into place and some parrots have been known to eventually damage those rivets to the point of destruction.
(Just like when you build with wood: make sure the mesh is attached on the inside - so the birds cannot gnaw on the structure)
Personally (because of Sunny) I was wondering about the corner/connecting pieces: they are some kind of plasctic on the outside and a metal core inside.
(the lighter grey ones in the 3rd link)
so I asked a builder...
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I just got the "all clear for macaws" from one of these guys, a long time builder, but am still 'testing the waters'. (looking for revieuws from greenwing and large too keepers -> the biggest beaks and most determined ones)
I am going with "if it is hyacinthproof, I trust Sunny will stay inside as well" -- but we have not enough hya's here (donations are welcome, of course

) so I am aiming for the next powerfull beaks.
Sunny is a champ at destroying "normal" macawcages -> the ones who have welded bars stand no chance.
She is now in an extra durable (but smallish imho) one, where the individual rods pass through holes in the in-between spacer-bars and end up inside the endframe.
(no loose ends anywhere)
(pfffft am I still making sense? Describing things in terms I am not competely sure of - and no pictures for you to help explain)
I am really tempted to get going and give this girl a larger cage- since there is still agression from Japie (he divebombed her to the ground from the top of the cage-again-a few days ago) I cannot have them all out at the same time and actually have a life ...
She uses about 1/4th of her cagespace atm, so there is no big need but well...you know as parrotpeople/ parronts -> we want the best, no settle for "good enoough"
but...this thread was not about me or my bird ;P it's about aviary-options. (sorry)
Will let you know yea/nae.
For every other parrot these are completely fine, just fact-checking on the musclemen and jailbreakers.
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