Jumper Ants (Myrmecia pilosula species group)

Jumper ants, or 'jack jumper' ants, have a well-earned reputation for being highly aggressive, and actually do sometimes jump in order to attack an intruder. They belong to the same genus as bullants, but in general are smaller. They are also easily distinguished from bullants by their bright orange or yellow jaws. Their venom is as allergenic as that of bullants, and has caused human fatalities from anaphylactic shock.