There are a number of breeders with pure birds that can be traced in lineage myself included. Gerald barker is the most well known green breeder in the US but there are a number of other breeders working to keep good greens alive in the US. The problem comes in the absolutely contemptible...
Imperators are by far the largest. One of my import line imperator roosters is at least 1/3 bigger than any of my muticus males. Specifers are the smallest.
From what he told me this is a what is considered a true muticus (Javan muticus) and that increasingly the birds we call muticus (Malaysian collected) are being considered to be a island race of imperators rather than true javanese greens. Given that all of what we call muticus birds here came...