The aim of this article is not to establish an unstoppable rule for the recognition of a gray male split (carrying) the black breast mutation. Rather, it aims to gather the clues that will allow you to identify it.
For this, every detail of the mutation is taken over, according to what I observed during the selection of my strain of gray black chest.
Before starting to analyze each possible clue, it seems important to me to bear in mind that the black chest mutation changes the shape of the drawings. To identify a split of the black chest mutation, I also advise you to take into account all the clues described in this article.
Let’s proceed and analyze the phenotype of a gray black breast from the head to the rectrices in comparison to a gray split the black breast mutation. To identify each descriptive term used, you can use this diagram : Descriptive terms in zebrafinch.
1. Mustachial line
Black chest : The moustachial line will be pronounced and intense black.
Split (/) Black chest : The moustachial line may be more pronounced than on a gray, however this does not constitute for me a sufficient clue.
2. Tear line
Black chest : The tear line disappears (ideally according to the standard) or only a fine line remains.
Split (/) black chest : Different cases depending on the force of expression of the mutation in the split.
- The tear line is present and fine :
- Tear line is present and wide :
- In some cases, the tear line of a split black chest may also be absent. It will be necessary to rely on the other clues to know if it is a split or a black breast in its own right.
Black chest : The drawing of the cheeks will extend up and back of the head.
In this article, you will find all the selection criteria to look for in an exhibition zebrafinch.
From the tip of the beak to the end of the tail of the zebrafinch : 11.5 cm.
Impression of strength - Short, stocky waist - Round head - Tight neck - Relatively broad and round chest.
The head, neck, back and tail should form a single line with minimal indentation in the nape and at the intersection of the tail at the height of the rump.
The curve formed by the rounding of the chest and the belly line should be regular from the throat to the anal region.
The back line cannot be crushed and the ventral line cannot be dropped.
All parts of the body should be in harmony with each other.
Well-rounded seen from all angles - Relatively wide front view - Must be in perfect harmony with the beak and body - Eyes placed approximately in the center of the head, very lively and dark in color unless the standard of the specified variety does not give it otherwise.