Kosher meat must come from an animal that chews its cud and has split hooves. (Cows, sheep and goats are kosher; rabbits, kangaroos and fox are not). Kosher fowl are identified by a universally accepted tradition and include the domesticated species of chickens, Cornish hens, ducks, geese and turkeys.

http://www.ok.org/companies/what-is-kosher/meat-dairy-pareve-setting-boundaries/