Return of the Cicadas is a wonderful and powerful short documentary by the filmmaker Samuel Orr. He has a kickstarter campaign going on which you can donate to, so he can complete his hour-long documentary.
I vaguely knew of cicadas before, but after seeing this film, feel I know a lot more about these incredible insects. 17 years! 17 years of living underground. 17 years of waiting. Two weeks of frenzied activity, and then death. The cycle repeats, ever onwards. It’s really rather fascinating, and shows the true nature of survival.