Which specific color mutation of the Senegal parrot is noted as being exceptionally prized and rare among breeders?

Answer

Blue mutation

While mutations like Cinnamon, Pied, and Misty exist, the Blue mutation is specifically singled out in the text as being considered very rare and prized among breeders.

Which specific color mutation of the Senegal parrot is noted as being exceptionally prized and rare among breeders?
rarityspeciesbirdParrot