Half-sider budgies [+WITH EXAMPLES PHOTOS & VIDEOS]

Leslie Berry
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Half-sider budgies are the rarest budgie variety all over the world.

Half-sider budgies are not a mutation, but they have a rare condition called tetragametic chimerism that causes the rarest color and type variation in budgies.

Tetragametic chimerism occurs in many living beings, such as butterflies, roses, cats, and humans.

Half-sider budgies
A half-sider budgie named “Twinzy” is a chimerism example in budgies.
Half-sider budgies
A chimerism example in animals
Half-sider budgies
A chimerism example in plants

How half-sider budgie occurs?

There is a half-sider budgie due to a known condition called the “tetragametic chimera.” A half-sider budgie occurs when two (or more) fertilized embryos (two zygotes) come together and create a chimeric embryo in the early stages of development, such as between 2 and 64 cells.

Between 2-cell and 64-cell development, the two embryos fuse with their DNA and become like a single embryo. The single budgie embryo continues to grow and become a healthy budgie.

A half-sider budgie is also called a chimeric budgie.

Half-sider budgies
How does a chimeric embryo occur?

How to produce a half-sider budgie?

A half-sider budgie occurs in particular conditions that randomly happen.

To produce a half-sider budgie, scientists must interfere with embryos during their early stages of development. It is not possible to have a half-sider budgie without a science laboratory.

What is tetragametic chimerism?

Tetragametic chimerism is a rare form of chimerism that is congenital. Plants and wild animals can also have tetragametic chimerism.

Are half-sider budgies bilateral gynandromorph?

Bilateral gynandromorphism means a being has both male and female characteristics with bilateral symmetry.

A half-sider budgie may be a bilateral gynandromorph, asymmetric gynandromorph, or tetragametic chimera.

Half-sider budgie photos & videos

Half-sider budgie photos

Half-sider budgies [+WITH EXAMPLES]
Half-sider budgie photo
Half-sider budgies
Half-sider budgie photo
Half-sider budgies [+WITH EXAMPLES]
Half-sider budgie photo
Half-sider budgies [+WITH EXAMPLES]
Half-sider budgie photo
Half-sider budgies [+WITH EXAMPLES]
Half-sider budgie photo

Half-sider budgie example video 1: A half-sider budgie “TWINZY”

Half-sider budgie example video 2

Is a half-sider but same color budgie possible?

Yes, a half-sider budgie may occur with embryos with the same colors and different DNAs. In this kind of condition, it is hard to understand whether a budgie is a half-sider or not.

Resources:

  1. https://en.wikipedia.org/wiki/Chimera_(genetics)
  2. https://en.wikipedia.org/wiki/Gynandromorphism