taking to mind that fine creatures have +8 ac and attack, it looks to me like a single normal wasp (not oversized) can kill a human commoner easily.
a wasp can do only one dmg point and has only 1 hp but it has ac 18, a 1st lvl human commoner can use a weapon (with +0 on attack), has 4 hp but only 10 ac.
a wasp can do only one dmg point and has only 1 hp but it has ac 18, a 1st lvl human commoner can use a weapon (with +0 on attack), has 4 hp but only 10 ac.