* CriticalResearchFailure: Alessandro's big cat form is called a "panther". Panthers are not a separate species, though, but a name for black jaguars and leopards. He also purrs, which is something big cats are uncapable of. Could be justified by saying that the big cat forms of the Carnevares don't correspond to real species of animals 100%. The Alcantaras' snake forms are described as having heads the size of a crocodile's, so this is pretty likely.
** Adders and vipers are treated like two different things when they aren't.