I have a green cheek conure and a crimson bellied conure sharing the same cage. I've had them for about 4 years and they have shared a cage. Now I am used to being bitten here and there by my birds (anything with a mouth can bite). So my green cheek has been showing aggression over time but I didn't think too much of it because I just felt like he wasn't in the mood. But recently he has, lack of a better word, attacked my face. I went to let them out of their cage like normal (they have their cage open whenever I am home). My green cheek conure climbs on me (I haven't touched him) and I am waiting for my crimson bellied conure to climb on (not touching him either) and my green cheek goes for my lip and bits hard to the point I bled. There have been times that when I do try to pet my crimson bellied (who wants attention) my green cheek will try to bite me. Now this made me think is my green cheek aggressive over my crimson bellied? How can I fix this? What should I do?