Whiteside pigeon colour genetics
“Whiteside” or “white shield” is a descriptor used to describe at least two separate and unrelated colour morphs caused by different modifiers. Whiteside-coloured pigeons are typically self-red or self-black, with unbroken white wing shields.
Neither are well studied, with further investigation required for both.
“Red Whiteside” appears to be most common in Dutch- and other European-derived breeds, and is related to Recessive Red. Some evidence suggests this may be a dominant or incomplete dominant trait controlled by a single gene – however more study is required.
Red Whiteside squabs appear self-red until their first moult, when they receive their white feathers. This is different to Black Whiteside pigeons, who are black and white from the nest.