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It is a rare example of a tetragametic chimera, which originates when two fertilized embryos merge during a very early stage of development — between the 2-cell and the 64-cell stage. Each half has different DNA, with genetically distinct cells and the resultant bird is in effect two budgerigars fused together to form a single autonomous ...
Two children with parrot cage (painting by Georg Friedrich Kersting, c. 1835) British birdcage, c. 1750, mahogany and brass, overall: 217.8 cm × 62.9 cm × 62.9 cm (85.7 in × 24.8 in × 24.8 in) Metropolitan Museum of Art (New York City) A birdcage (or bird cage) is a cage designed to house birds as pets.
This is an accepted version of this page This is the latest accepted revision, reviewed on 28 February 2025. Small, long-tailed, seed-eating parakeet Budgerigar Temporal range: Pliocene–Holocene Pre๊ ๊ O S D C P T J K Pg N Blue cere indicates male Flaking brown cere indicates female in breeding condition Conservation status Least Concern (IUCN 3.1) Scientific classification Domain ...
The first nest produced 3 cobalt birds with yellow masks, etc, like Mrs Lait's birds described above, and one green-blue bird like the mother. The second nest produced exactly the same result." The description of the birds suggests that Mr Long's birds were a DF Yellowface II Cobalt cock and a SF Yellowface II Cobalt hen, but the breeding of ...
The double-factor Dominant Grey, with two Dominant Grey alleles, is identical in appearance to the single-factor Dominant Grey, although there is some evidence that the colour of the breast afterfeathers is changed from white to grey in the double-factor bird. The Dominant Grey gene is located on one of the autosomal chromosomes. There is no ...
She bred this from a 'blue-bred green hen' and a 'badly coloured Yellow cock', [5] so either the Yellow cock was a Greywing and the hen split Greywing, or the bird bred was not a Greywing at all but a deeply suffused Yellow. G F Hedges established a Greywing strain from birds obtained, it is believed, from the Blanchard aviaries in Toulouse ...
When the Clearwing and Greywing alleles are both present the genotype is dil cw /dil gw and the bird is known as a Full-bodied Greywing. Both alleles are partially expressed, giving the bird wings like a Greywing and a body colour like a Clearwing. A more detailed description is given under the Greywing mutation.
For example, "Alexandrine parrot" and "Alexandrine parakeet" are two common names for the same species, Psittacula eupatria, which is one of the largest species normally referred to as a parakeet. Many different species of parakeets are bred and sold commercially as pets, the budgerigar being the third most popular pet in the world, [ 3 ] after ...
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