Occamy

Found in East Asia and India, the Occamy was a two-legged bird like creature with a serpentine body and wings. It could grow up to fifteen feet but mainly fed on rats and birds, meaning it wasn't an immediate threat to humans. That was, unless, it was protecting its rare and beautiful silver eggs, in which case they would display incredibly aggressive behaviour. The creatures also had choranaptyxic abilities, which meant it could shrink and grow to fit a space, as Newt Scamander once found out the hard way.