Follow up to "is this OK?" !!!

[1sydneybird]

OK, I will get some photos up with the help of my kids OK, this freaked me out. Syd is the most gentle soul. Today, when he was on Roxys cage, he made a sound that he typically does, which is like "Whhaaaaaa" then did this weird dance thing while hanging on the cage the TRIED TO BITE ME!!! What the heck? He did this like 3 times before I showed him the perch to step onto. He stepped right up on my finger after that. BUT, this freaked me out in regards to getting our potential new Baby. Was he being aggressive and territorial around Roxy? Will he react this way if he bonds with another TAG? He was almost openiing his mouth for Roxy, like a mamma bird does for feeding her babies, and Rox was having his beak in Syds mouth, like he was eating. Is this WEIRD?