Hi i have a green quaker parrot and a blue streaked lory.
my qauker's name is paco and the lory's name is deedee. paco and deedee live in the same cage together which i think might be afactor but im not 100% sure. when i first put paco and deedee together, he didnt see agressive at all. then as a few years went on, he got mean and squaked when i approached their cage. He jumps to the front of the cage and starts hissing and making biting gestures.
this is the hardest part: trying to take him out. what i have done recently is taking a soft pillow case and laying it over my hand so if he does bite, he chomps down on the fabric instead of my finger. its very difficult to take him out because he jumps all over the cage and at the same time deedee then gets insane. as soon as i get paco out of the cage he seems to calm down a bit but still trys to bite down on my other finger when i try to swtich him to my other hand. he seems to feel commfortable on my hand for some reason. The strange thing is that his behavior totally changes when hes away from his cage which leads me to think that it had to do with TERRITORIAL PROBLEMS. i think this because once he gets downstairs where i set him and deedee on a chair so they can relax and hang out with me, hes all calm and mellow. he'll preen himself and deedee, puff up in contentment, stay nice and quiet and snuggle with deedee too.

so my question is: what do you think is causing paco to do this and how can i reduce it or get rid of it permently (i dont mind how long it takes to cure it ^-^ )

~thank you, Cheyenne

It often happens when you put two birds in a cage together. Then instead of being bonded to YOU, they bond to each other. Then when you approach the cage, one feels that he must protect the other one from you.
Some birds never get along together, but when they do bond, it's only for each other and you are the enemy.

Being together for that long might make it difficult to ever bond with either of them again.
Sometimes you can seperate them and make it work, but not so most of the time.

Oh, welcome to the group. I hope someone comes along and has a suggestion that works into a solution to your problem.

I don't have a solution but welcome to the forum

Someone will come along that does.

You could try separating them and see if that improves the situation. I think Majj is right and your Quaker thinks he has to protect the other bird from you.

I have to agree with the others.. But then again My elvis is agressive and he bites

Sounds as though they have bonded and view each other as mates. If you do separate them keep there cages side by side at first. It will help make the separation easier and less traumatic on them.