The normal budgie is one whose markings match with the wild type budgerigar. It can be any of the basic body colours, but so long as it has the wild type markings it will be of the normal variety. So you can have normal skyblue, normal grey, normal dark green.... etc. Firstly, lets look at a wild budgie, pictured below on the right. We specifically need to focus on the markings to get an idea of what normal markings are.
From the forehead and down the back to between the wings they have black and yellow stripes. The feathers on the wings are blackish with yellow edging, with the long flight feathers being black, with a thick yellow bar along them that is only visible when the wings are extended. The primaries, and some of the lesser flight feathers, have a lovely green tint only visible in certain positions. The long tail feathers are a lovely dark teal blue, with the tail coverts having a thick yellow bar through them.
Though the feathers covering the wing look yellow and black they usually have a yellow edge then a black section with the centre of the feather faded to grey or greenish grey. This varies from bird to bird but most wild budgies have this patch of colour in the centre of the wing feathers rather than being solid black. In exhibition budgies the solid black feathers give the wings a lovely sharp contrast of black and white or yellow, so it has been selected for and now many do not show the wild type effect. I think both wing types have thier own beauty, and the wild type is certainly useful in breeding some varieties, such as clearwing.
If you are not sure what any of these descriptive terms mean, please visit the Budgie Anatomy page.
As mentioned above, the normal budgie can come in all the basic body colours; light green, dark green, olive, grey green, skyblue, cobalt, mauve, grey and all the violets. None of these body colours change the pattern of the budgies markings, but the different shades do alter the colour of the tint on the flight feathers and the wing feathers. This is a useful feature if you are trying to determine what shade your budgie is, but more on that on the budgie body colours page.
markings can also be combined
with other varieties that alter the colour of those markings, to
many beautiful birds; cinnamon, greywing, clearwing, dilute, fallow and
golden face, to name just a few. Remember, if the markings are in the
same pattern as a wild budgie, then the bird is still a normal, but if
the pattern of the markings is changed, then you have moved into another
Basically any bird that still has the wild type markings is a normal, so you can have a normal cinnamon or a normal yellow face blue etc. It is usual just to skip using the term normal, and refer to them simply as a cinnamon or a yellow faced blue, for convenience though.
The normal budgie is the standard by which the inheritance of other
colours and varieties are described. If a variety is recessive it means
that it is recessive to the normal (the wild type) form. If it is dominant it means it
is dominant to the normal form. Each gene has a symbol for the wild type and a symbol to represent the mutated form of that gene (its allele). Though there is no international agreement on what names and symbols are used for budgerigars the list on the MUTAVI site is my prefered one. They work with many parrot species and follow an international agreement which has been voluntarily agreed to by other parrot breeders and organisations.
So to describe how the normal is
inherited you really need to know how the variety it is breeding with
works. Take a look at the other varieties to understand how they react