I curious to know how a you could have a mesorah for an animal that you never knew existed.
The turkey is a famous question. No need to reinvent the wheel here.
My favorite answer is that it was discovered and decided kosher according to the simanim shortly before the minhag began to only use mesorah on birds.
The bison is also a famous question. My favorite answer is we hold you don’t need a mesorah on beheimos. Alternatively its the same animal as a cow.