And your case is merely to deny any scientific evidence. Or, to use your own terminology, to refuse to obey the demands of the experts. Your ‘case’ is merely your opinion, based very loosely on Genesis in a few cases (e.g., dove versus raven), but mostly on looking at pictures in books and claiming that those animals look the same to you, thus they must be the same thing (note that neither Thylacinus nor Thoatherium are mentioned anywhere in the Bible).