Northern bobwhite “pearl” vs “Mexican speckled” bobwhite (females)

I made the under-reported pictures to clearly show you the difference between the “pearl” colour-mutation of the Northern Bobwhite (Colinus virginianus) and the Mexican speckled bobwhite (Colinus mexicanus).

I pretty know that some scientists consider that the Mexican bobwhite is a mutation of the Northern bobwhite that appeared in the wild.
In fact, the intercrossing of these species produce chicks of both phenotypes, without alternation of the type and I personally think that those scientists are right…. but this is not the subject of this post…

So, I made a few pictures of two females to let you see the different pattern on the back and also on the head. I will try to take the time to take the same pictures with males too.
Have a look!

Hybrid birds between Northern bobwhite and Masked bobwhite, 2019

I firstly would like to precise that the below-pictured birds were not bred in my aviaries but well bought from another breeder.
They normally should have been pure specimens of the Masked bobwhite (Colinus virginianus ridgwayi) but a quick 5 seconds examination confirmed that there is without any doubt blood of Northern bobwhite (Colinus virginianus) mixed inside…
I have no idea how much %, F1 or F2? and the exact mating(s) done…

Male:

Female:

This is a little “head comparison” collage I made of the two pure species and my “hybrid” bird in the middle… I think it helps to understand better!

From left to right: Masked bobwhite, hybrid, Northern bobwhite

It is quite difficult to determine how much % blood of common Northern bobwhite (Colinus virginianus) is present in the genotype of those hybrid birds but, in my opinion, the breeder crossed more that one time …
I will not try to make the same collage with female heads because the difference is most on the back for hens.

Outside laying cages installations overview

I have some outdoor breeding cage-blocks which are sheltered from rain and drafts while being in the open air.
The animals benefit from natural light and keep pace with the seasons without dimmed artificial lightening. They are:
1 block of 15 trios of Northern bobwhites (Colinus virginianus)
1 block of 12 pairs of Chukar partridges (Alectoris chukar)
4 blocks of 15 trios of Japanese quail (Coturnix japonica)
1 block composed of two thermoregulated chick maternities for very little chicks and 3 growing cages for older chicks.
Below are a few pictures I have taken in 2019 and also three little films :