The search for ideal Budgerigar has always been an obsession for all breeders around the world, regardless of their knowledge or their financial condition. The model of "Showbird" has evolved intensely since the beginning of creation focused on genetic improvement to the present day.
When confronted images of different models over time is really hard to imagine that the current budgerigars are the same species native to Australia, Melopsittacus Undulatus. 
Here in Brazil this search was not different and even being very distant geographically from Europe and the developments to which the budgerigar had been submitted, the passion to breed them and the will to improve them as to their "form" was exactly the same.
At first, the many variety of colors and the docility of the bird raised in captivity has made the budgerigar became very popular, even in a country where there is already a great richness in diversity of native species of parrots, as in Brazil. 
It was many years since the beginning of the process of genetic selection, which basically sought specimens with a larger size to the current model, where the quality of feathers and the proportion of measures are prevalent. 
Important features have been assigned to the species gradually during this selection process, such as the lateral direction of the head feathers, and which ultimately resulted in a very different visual appearance in recent years. 
I believe that these changes are intrinsic to the process of selecting the type of feathers as to its texture and length. 
Being able to bring the genetic heritage of continental Europe to Brazil was a very important step in this process and, more specifically, in the last ten years, the introduction of the genetic heritage of the birds of Daniel Lütolf was actually extremely important in changing the brazilian Showbird .
The structural differences found in the "shape" of birds and  in the quality of feathers was very significant.
Of course that breeders who were already developing an orderly and selective conscientious work got them faster, however, the aggregate qualities were very evident, could be identified very early, even in the offspring in the nests, the extremely soft texture of feathers . 
The  features as direction of head feathers quite evident until then rare in Brazil, and a compact head-shoulder connection, have become common in the current Brazilian Showbird. 
When we think of physical features of the budgerigar, related to its shape, we should not do it by Mendelian perspective, that because these characteristics are promoted by recombination gene related to the morphology of the bird, not the isolated action of a gene or by joint action of two or more specific genes,
as in the process of selecting the colors of the budgerigar, since the genes have been related to colors, mostly identified and described his conduct in the  heredity , unlike what happens with the morphological genes.
For this reason, the action of the breeder in the process of morphological selection of birds, related to its shape and quality of feathers, becomes even more important.  
This selection is that it will ensure, through the generations, that the specifications of the bird's physical features being transferred to their offspring, in heredity.
So when we find that a particular genetic heritage deeply marks the phenotype of their offspring, this is certainly a sign that the selection of morphological process and genetic improvement was very well done, and it shows already settled.
That's exactly what happened during the introduction of genetic heritage Lütolf in Brazil. 
Unfortunately the present restrictions on poultry imports hinder faster progress in genetic improvement of Brazilian budgerigar. We are managing to overcome barriers such as information dissemination to all breeders in Brazil, despite the continental size of our country, and even to Latin America in general.
The technology shortens distances and allows for faster access to information. This process allows us to make a better assessment of the qualitative distance of our birds in relation to magnificent European "Top Birds" , however our search for genetic improvement will always continue incessantly .
I believe that the natural evolutionary trend of ideal budgerigar
is a bird that is large and compact with face and broad shoulders, but that has long feathers and soft, direction of  head feathers quite evident, and having the longest feathers on the head than in the rest of the body.
These features are striking in Daniel Lütolf´s birds and, most important, are clearly conveyed in heredity. Fortunately we had the opportunity to have this proof in the evolution of Brazilian Showbird !

                                                                                                                             
                                       Fulvio Lucietto – Brazilian breeder and budgerigar’s judge
                                                                 (budgerigart.blogspot.com)

                                                     Translated  by  Luiz Américo de Souza