Short-lifespan
Guides
Dolania americana
American Sand-burrowing Mayfly
Dolania americana is a predacious, sand-burrowing mayfly and the sole species in the genus Dolania. Adults exhibit an exceptionally brief lifespan, emerging before dawn, mating, and dying within approximately thirty minutes. Females deposit eggs in water and die within five minutes of emergence, representing the shortest known adult lifespan among mayflies. The species has a two-year life cycle with synchronous mass emergence and specialized reproductive adaptations including large, energy-rich eggs that produce unusually large first-instar larvae.
Ischnura hastata
Citrine Forktail
Ischnura hastata, the Citrine Forktail, is a small damselfly with remarkable reproductive diversity across its range. Native populations in North America exhibit typical sexual reproduction, while populations in the Azores archipelago represent the only known example of parthenogenesis in the order Odonata. A population in the Galápagos Islands has evolved monandry (single mating per female), driven by extremely short adult lifespans of 1–3 days. The species occupies diverse wetland habitats from temperate North America to oceanic islands.
Tachytrechus auratus
Tachytrechus auratus is a species of long-legged fly in the family Dolichopodidae. It is restricted to specialized wetland habitats in east-central Washington State, where it occurs on mud flats and freshet seeps. Adults are active from late spring through early autumn with a maximum lifespan of approximately one week. The species has a relatively brief pupal development period of 4 to 7 days.