They really can be. I have to be very careful with these guys they crack brazil nuts with their beaks. They can take a finger off you, in my case they could fracture my ulna/radius. But I just put the nest box up. I am hoping for babies in the spring.
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Interesting the female, in the foreground, loves my husband and hates me with a passion. The male is a bit more reticent and though I hand fed him from an egg he's hesitant with me now. For scale that cage is about 10' long and about 5' wide. The rest of their toys and crap needs moved in but I'm done in from putting that massive, heavy thing together.