[Moltke]

When all the animals on the planet and fish in the ocean are extinct, the ants will still be here.

It will be the ants vs. the cockroaches one step before that. Yeah, my money is on the ants as well.

Anyway, the entry on ants at Wikipedia contains a link to the Schmidt Sting Pain Index that is too good not to share (useful reference):

http://en.wikipedia.org/wiki/Schmidt_Sting_Pain_Index

[Yardstick]

Those sting descriptions are great.