With still more species it could be entirely practical to “breed back” over a few generations. Regarding species not yet established, the rocketing prices of the remaining birds are concentrating minds wonderfully – and often there are more surviving birds countrywide than you might expect. Which brings me neatly to the purpose of this article! Practically every species of foreign bird (in either of the above categories) has its devotees who would be anxious to acquire pure normals if the birds were available. It is also my experience (with Diamond Doves and Spectacled Parrotlets among others) that if you advertise for people holding the species you get responses from successful breeders worried about inbreeding but either not able to find other breeders or concerned about introducing mutations via visual normals. >>>