Aggressive Female Budgie

[Ann 0]

I am new to this forum but have a problem that I hope someone will enlighten me. My female budgie who is about 3 year old becomes very aggressive to other budgies in the aviary. In the past she has attacked other females but has also successfully had babies while in the large aviary. I have 10 birds - female and male. Last spring I put her in a breeding cage with a male but no eggs were produced.

They happily live together except at this time of the year. I don't necessarily want to breed but I have taken the precaution of putting her alone in a seperate cage. Are some budgies naturally aggressive like this, because the other budgies in the aviary are fine and don't seem to fight. I would appreciate any feedback.