I'm looking for the published intelligent race (INT 3+) with the shortest lifespan. No need to be a playable race. Any edition will do, but 3.5 is preferable. Hoping for something with a lifespan of weeks.
I intend to run this in 3.5, but don't mind porting. My plan is to make a short-lived race's settlement around a Photostatic Rock deposit (an underdark feature that memorizes event around it) and use it as a form of 'cultural memory'.
I need natural lifespans, so no summons. First-party content is strongly preferred.