Although i would highly discourage searching for a bunyip, as they are quite a dangerous beast known for dragging it's victims into the nearest watering hole or billabong as it's called here in Australia.

Currently my research has lead me to believe the current range on the bunyip does not extend out side of the billabongs of central Australia, although evidence would suggest they had a much wider range before human population reached an over bearing amount. Bunyips are currently not protected in Australia and can be freely hunted on the basis that they are dangerous to humanity, but as far as i am aware there have been no sightings of bunyips actively hunting human and most attacks are provoked, i myself have been near bunyips, and as long as i kept my distance i didn't worry them.

Bunyips currently have no rating but i would rate them as XXXX as although they may not actively hunt wizards or muggles alike, anyone who get's too close will be attacked (unless you approach them the right way), do not attempt to handle a bunyip unless you have studied these beasts and no what you are doing.