Christina,
I think the reason that there are so many conflicting reports of how long Blue Crowns, or any other bird for that matter, is that no one really knows. With improvement in diets and understanding of parrots has come longer life expectancies. We may just not have had them long enough to know.
I would expect that you bird could live to 20, 30 or even 50. Who knows?! Just enjoy the time you have.
Jean






