What animal could just wipe out the entire human race if they were fed up with us?

Maybe not one animal, but as we've already established that none can do the trick alone: I'm going with a combined effort of pollinator species, worms, ants, mosquitos and locusts. The pollinator insects go on strike, while the worms and locusts start attacking our crops, the locusts are there to make the whole thing look biblical, which is sure to decrease morale. Meanwhile, the ants are put on sabotage duty and start swarming power plants, warehouses and hospitals by getting into electronics, which has the added benefit of maybe starting a fire once in a while. Massive recessions and layoffs follow suit The mosquitos are on assassination duty, specifically targeting humanity's highly educated population as well as members of government to further disorganize us, but leave one world power completely untouched. The blame game begins. Their endgame would be to trigger mass destabilstion in order to kickstart world war 3 and let the humans take over from there.