Hullin 59: The Species the Torah Knows, Including.... a Unicorn?

What are kosher animals? What are non-kosher animals? That is, from the signs listed in the Torah for domesticated and non-domesticated animals -- such as split cloven hooves and chewing its cud (for the former category). Ditto re birds -- excluding predator birds, where the forbidden ones are listed explicitly (or perhaps for the sake of deriving a general rule). Likewise for the few kosher creepy-crawlies. And fish (fins and scales). Plus, what if there is no tradition with regard to a certain animal (eg: duck; turkey). Also, the signs of the undomesticated - which might seem superfluous, but they permit the special fat, which might appear to be incorrect, so it's explicit. Plus, a unicorn. With caveats on the horns making various goats and their cousins