King brown snakes
The king brown snake can be found in parts of Australia and they are highly deadly. The poison that they have can kill a small-sized creature in a matter of minutes. So it’s safe to say that we don’t think Charlotte would have had enough time to make it to the hospital.
The snakes are not uncommon in parts of the country, but thankfully there is an antidote to their venom that can be found all over Australia, as for many other snakes. For larger animals, the venom might take a few hours to go to work, so Khan had a bit of time and a chance at surviving.