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Additionally, while Bourke's parakeets lacking a color mutation can often be sexed visually, males and females with a color mutation cannot. [18] There have been recorded instances of the Bourke's parrot producing hybrids with the scarlet-chested parrot (Neophema splendida). [19] [20]
The science of budgerigar color genetics deals with the heredity of mutations which cause color variation in the feathers of the species known scientifically as Melopsittacus undulatus. Birds of this species are commonly known by the terms 'budgerigar', or informally just 'budgie'.
The Anthracite budgerigar mutation is an extremely rare mutation that occurs in the budgerigar. The mutation, similar to the Violet budgerigar mutation, causes a difference in the coloring of budgerigars. Anthracites have black or very dark gray feathers, possibly with some white depending on the budgerigar in particular.
It is a further mutation of the ino locus with the symbol ino cl. Together with the Ino mutation, it forms a series of multiple alleles. The order of dominance is ino +, ino cl, ino, with ino being the most recessive. Mutations which are allelic to Ino and cause partial albinism are known as Par-ino mutations in parrot species. [5]
The Recessive Pied budgerigar mutation is one of approximately 30 mutations affecting the colour of budgerigars. It is the underlying mutation of the Danish Pied variety, aka Harlequin. It is believed by Inte Onsman of MUTAVI [1] to be the same mutation as the Anti-dimorphic Pied (ADM Pied) found in some parrots. [2]
When combined with the Dark mutation the body colour of both Greys and Grey-Greens becomes slightly darker, but the effect is much smaller than the effect of the Dark mutation on Light Greens and Skyblues. As this is a dominant mutation the colour changes described above apply to both single factor (SF) and double factor (DF) Greys and Grey-Greens.
This formulates biochemical models that explain natural color variation in parrots. [1] 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.
The most easily bred are Bourke's parrot (as Neophema), the scarlet-chested parrot (N. splendida), the turquoise parrot (N. pulchella), and the elegant parrot (N. elegans). The most difficult and uncommon captive is the rock parrot (N. petrophila). Aside from Bourke's parrot, all are distinguished as predominantly green birds.