See how Australia's grasslands harbor animals worth worrying about, especially the venomous reptiles that slither among the country's green fields.

Which beast has the most vicious bite? It might be the jaws of an ancient creature, a rare reptile's fangs or poisonous spines caught on a fish hook.

This episode counts down Australia's top 10 deadliest animals, including the razor-jawed jack jumper ant and the beautiful killer box jellyfish.