Seeing that these occur wild in the Norther parts of Aus, I thought that some one could spare a bit of information on breeding and housing these finches/ manakins are they easily bred, are they compatabile

There are a few around here in RSA however many are crossed with other nuns and manakins and one finds true strains difficult to come buy , having purchased a few young birds and once they coloured up ther chests were blotched with patches of Black and white and were not solid brown, is this crosses or just diffrent coulouration??
Thanks
G...