Trace the life cycle of mayflies, and explore why these swarming insects are a sign of healthy aquatic ecosystems.



For most of the world’s 4,000 mayfly species, adulthood lasts roughly one day. And for some species, it’s only a matter of minutes. This isn’t because they’re all eaten up by predators. Rather, this abridged adulthood is a natural part of their life cycle. So, what role do these bugs play in their ecosystems? Luke M. Jacobus explores the stunningly short life span of the winged insects.

Lesson by Luke M. Jacobus, directed by Denys Spolitak.

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