The first zebrafinch on display were far from the ones we now have on our farms. Birds filiform and small resembling in every point the majority of the birds that we currently find at the pet shop at the corner of the street.
Evolution does not know made in a day but it has been relatively fast. Here we will talk about gray zebrafinch, all simply because it is my specialty and that I begin to know it well.
We can observe that gray, which is a classic (called "classic" gray and basic mutations that are: brown, pale back and masked.), Presented in major exhibitions is not very far from the gray perfect. The type and size are for the most part excellent and the difference is mainly on the color.
To identify each descriptive term used in the rest of the article, you can use this diagram : Descriptive terms in zebrafinch.
1. Main defects of gray males
In recent years many defects have appeared in the gray that we have the leisure to see in our exhibitions. I will introduce you to some of them that are for me the most commonly encountered on display or in our farms.
a) The zebra behind the cheeks
For about two years, at least from what I personally noticed, we see traces of welts around the cheek. This defect is rather noticeable in gray cheeks, but fairly recent in gray males. There is still time to eradicate strains of gray before it is fully generalized to gray zebrafinch.
By the similarity to the present defect in the black cheeks, I do not think that we can assimilate it to a factor cheeks black. Indeed this defect appears even in the strains having no affiliation with a strain of black cheeks.
On the other hand we can think that this phenomenon is due to a high concentration of eumelanin (black), which is sought in gray for a very dark back and in the black cheeks for a very deep black color.
b) Tear spreading in the cheeks
Another defect, the tear that gives an impression of diffusion in the cheek by the presence of some black feathers in them, and a line under the eye. Generally in my breeding they are birds that have cheeks of a deep chestnut. I think that still has it, we can equate it with an excess of eumelanin in this area.