Blue Budgerigar Mutation - Appearance


The Blue mutation changes the colour of the body feathers, which are light green in the wild-type, to skyblue and the colour of mask and other parts which are yellow in the wild-type, to white. In the domesticated bird this mutation changes the Light Green variety into the Skyblue variety, the Dark Green into the Cobalt and the Olive into the Mauve.

  • Light Green cock

  • Skyblue cock

The green colouration of the wild budgerigar is due to the combined effect of a yellow pigment and an interference effect similar to that which gives colour to petrol on water, which in the budgerigar produces a blue colouration. Yellow pigment is present in the outer layer (cortex) of the cells forming the barbs of all feathers of the wild budgerigar with the exception of the cheek patches, although it is very weak in the outermost flight feathers. The distribution of the yellow pigment is clearly shown in the Lutino. The Blue mutation totally inhibits the production of this yellow pigment, and as far as is known, it has no other effect.

The yellow pigment in young budgerigars is paler than in adults, which makes green budgerigars in nest feather appear duller and Lutinos appear paler. A brighter and stronger yellow colouration appears after the first moult.

Variety Pantone Code
Light Green 375
Skyblue 310
Cobalt 2915
Mauve 535
Violet 2727

The chemical nature of the yellow pigment in budgerigars and other psittacidae is unknown, and in the absence of a chemical name George A Smith coined the term "psittacins" to cover the yellow, orange and red pigments found in parrots and parrot-like birds. Psittacins impart a far more constant intensity of colour to feathers than do the more commonly found carotenoid pigments such as xanthophyll, the yellow pigment found in the canary. At each moult the canary extracts xanthophyll directly from its food, and the depth of colouration of the growing feathers is determined by the concentration of xanthophyll in its diet. Budgerigars cannot be colour-fed in this way, because they do not use xanthophyll as a pigment.

The Blue mutation provides a widely accepted division of domesticated budgerigars into two colour classes: the "Green series" and the "Blue series". Birds of the Green series exhibit yellow pigmentation, while birds of the Blue series lack yellow pigmentation. These names can be misleading, since some birds belonging to the Blue series, such as Albinos, are not blue; similarly, Lutinos belong to the Green series, yet are not green.

In combination with the Dark budgerigar mutation the body feathers become deeper shades of blue. A blue budgerigar with a single Dark factor is called a Cobalt, and one with two Dark factors a Mauve. The World Budgerigar Organisation has established precise standards for budgerigar body colours using the Pantone Codes, as shown to the right.

Read more about this topic:  Blue Budgerigar Mutation

Other articles related to "appearance":

Grover - Appearances - Mother
... Over the course of time, her appearance has fluctuated greatly ... Her earliest known appearance as a Muppet is a 1970s sketch in which Grover speaks to the audience about being afraid of the dark ... Another early appearance (circa 1981) involves his mother (Kathryn Mullen) coming into the bathroom while Grover is telling the audience about how to take a bath ...
Batman: The Animated Series - Characters
... such as Count Vertigo, the Mirror Man, and the Clock King, were modified for the series in both appearance and personality ... back after "killing" him off some years earlier Clayface was revised to be much more similar in appearance to his animated counterpart Poison Ivy took on the slightly inhuman, green skin ...
Weimaraner - Description - Appearance - Size
... Females are between 23 and 25 inches (58–63 cm) ... Of course, there are many dogs taller or shorter than the breed standard ...
Oriflamme - Appearance
... The surviving descriptions of the Oriflamme are in Guillaume le Breton (thirteenth century), in the "Chronicle of Flanders" (fourteenth century), in the "Registra Delphinalia" (1456) and in the inventory of the treasury of St ... Denis (1536) ...
List Of Last Of The Summer Wine Episodes - Series - Series 12 (1990)
92 2 September 1990 "Return of the Warrior" 1 This episode marks the final brief appearance of Seymour ... This episode includes the second, and final, appearance of Jack Harry Teesdale 23 ... September 1990 "Walking Stiff Can Make You Famous" 1 Foggy invents bicycle polo 30 ... September 1990 "That's ... Features a guest appearance from Gorden Kaye as a TV announcer 28 ... October 1990 "Roll On" 2 Foggy invents the sport of barrel-rolling 4 ... November 1990 "A Landlady for Smiler" 2 Smiler is re-introduced as ...

Famous quotes containing the word appearance:

    I think I am one of those who can manage not to take on a completely different appearance under their own glance.
    Jean Rostand (1894–1977)

    The President has paid dear for his White House. It has commonly cost him all his peace, and the best of his manly attributes. To preserve for a short time so conspicuous an appearance before the world, he is content to eat dust before the real masters who stand erect behind the throne.
    Ralph Waldo Emerson (1803–1882)

    When appearance and reality coincide, philosophy and literary criticism find themselves with nothing to say.
    Mason Cooley (b. 1927)