Conure become aggressive!

[Fare]

Morning guys I bought this yellow sided under a year ago and was advised he was not hand reared which I understood though also that it's possible to tame them down. I spent time playing with him had him as far as sitting on my hand and allowing me to stroke him.

Recently though I put him in the cage with my tame green cheek and he's become so aggressive at the sight of my hand he's after it making it hard to feed them in one of he cages!

Any advice

 

[Dinosrawr]

Chances are he has bonded with your tame green cheek and views you as a threat to his new buddy/mate. It happens quite often when pair bond birds encounter one of their own and haven't previously bonded to a person before hand. I think if you'd like to have him tame again, you'll have to remove him from the cage and try and hopefully establish a bond with him individually once again and try to keep them in their own cages again.