Here in Aus where I am, I get wild Pale Headed Rosella's in My backyard
The Rosella Family is broken up into 2 species: Blue Cheeked and White/ Yellow cheeked
All of the Rosella's are descendants of each other, subspecies have mixed throughout the centuries and create their own new species, and are all over the continent
The Northern Rosella's are the most expensive in Aus, and the Easterns or Pale Heads are the cheapest
There are heaps of sub species like: Western Rosella's - Blue and Red Backed, Pale Headed Rosella's- Normal and Blue Cheeked, Eastern Rosella's - Normal and Golden Mantle, Crimson Rosella's - Normal and Bunya Mountain
There are heaps of different Subspecies here that have not mentioned, but I am not prepared to write them all down
Thanks