I'm positive she's a she..LOL... and as far as any one thing in particular that she defends, no, it's everything.. toys, fruits/veggies, food bowls, etc... Example (just happened in last 15 min)... Both birds were on top of the cage, the female was standing on the opened door, she turned around, jumped at him and started biting.. His back was to her... She will chase him around the cage until he flies out. And yes, she does share more than bicker with him.. It's just the times that he will be quiet and happy and out of nowhere she starts biting.. Thanks to all for your replies and advice...