One of the most common mutations is the appearance of male colourations in a female, or the appearance of female colourations in a male. This happens in 42% of female births, and 23% of male births, and is a dominant trait.
Another rather common mutation is being born without a sex, aka without sex organs. These neutral dreer often show an even mixture of male and female characteristics, that are mostly determined by the genes from their parents, often showing more traits from their father than their mother, such as sharing the shade of grey that their base is, or having a pattern on their wings. This occurs in 32% of births, and is a recessive trait.
The most common mutation is having any amount of white on their pelt, often on their underside and legs, though it's not uncommon for them to be piebald. This occurs in nearly 63% of births, and is a recessive trait.
A rare mutation is albinism, where the entire base, hooves, talons, tongues, and talons are white, and the eyes, pawpads, and nose are pink or red. This occurs in 12% of female births, and 7% of male births, and is a dominant trait.