I suspise that it might be a new change in her surrounding. I don't mean like she changed places to be or anything, it might be that some new changes have happened to the normal routine that she's used to.
It might also be that she's just a bit mischievous. It might be an affectionate bite or a mean bite. If she bit you softly, it probably means that she likes or that she's slightly annoyed with something at the moment. If she bit you hard, that probably means that something extremely terrible happened and she needs to 'discipline' you. Or maybe she's very stressed or bored and she needs something interesting to do. It might be that they thing your're a treat. Sounds weird, but my birds do that when i clicker train them. They sometimes bite my finger, mistaking it for the treat and sometimes even the pointer that i use. Anyways, Good Luck with your green cheek conure!!!!
Maybe she is starting "puberty" and is a little hormonal.You probably just upset her or did something she did not approve of.
My gcc bit me out of nowhere. No changes in her diet. Surroundings. I have no clue what happened. Any one?
