Sense Sonnet - Pumper

Bilateral Gynandromorph

Bilateral gynandromorph -
Body half male and half female.
In bird species, giant or dwarf,
"Half siders" are on a rare scale.
It can occur when the egg cell
Is double fertilized by sperm.
Taking sides, chromosomes then dwell
Until the hatchling comes to term.
The hatching then develops, so
He/she is male on one side, and
Female the other side does show.
This is quite rare, please understand.

Such a bird can certainly be
A birdwatching event to see.