... the world really is doomed. I mean wtf kind of thread is this? Want to know about a really useless species that fills no role in the ecosystem except to destroy and devour? It's called: Humanity. Let's gas all humans so the rest of the planet can live on. Seriously, if we're basing the 'right to exist' on how "needed" (aka useful) a species is, then we should be the first to go.