There have been 3 out of the 5 sub-species available in the U.K, P.molinae molinae, P.molinae restricta, P.molinae australis.

The status at the moment is; m.australis being the most common…then m.restricta & finally m.molinae which is getting quite hard to find, due to owners not being aware what they have got. Also crossbreeding has taken place with the other Green-cheeked sub-species, which has a doomed effect on any species. M.molinae use to be the commonest, but m.australis was imported in large numbers so m.molinae seems to have faded out. I do know of a few pairs still being kept and bred here. At present i'm keeping/breeding P.molinae australis , & P.molinae restricta in the Green cheeked.

P.molinae sordida i have found this sub-species to be avalible on the continent (Holland & Belguim). It appears the 1st blue mutations have been bred from sordida.

The majority of crossbreeding seems to take place between m.molinae x m.australis as they are quite similar, the main difference between the sub-species is: -

P.molinae molinae is a bigger bird (stockier) this is easily seen when you have the different sub-species together. The maroon patch on the lower belly is not as abundant in most i have seen compared to m.australis. The cheek patches are plain green (no blue) also a bit bigger, only a trace of blue on hind-neck & a very light wash of blue can sometimes be seen on the vent, and the green areas tend to be a shade lighter in natural day-light.

P.molinae australis is properly one of the most colourful of the Green-cheeks, all the colours look rich in colour, the maroon on the under belly is a lot bigger, there is sometimes a light blue wash on the vent, on most birds it is completely absent, they do have the blue collar on hind neck. Cheek patches are green (no blue).

P.molinae restricta cannot really be confused with the other sub-species as it's the only one with a blue wash of feathers on the back of its wings, it also has plenty of blue on the under belly, vent & cheek patches. The maroon patch is not very prominent; sometimes just a wash of maroon can be seen.