In one study, the median lifespan of earthworms was 4.25 years while the oldest earthworm was 8.73 years.
Depending on the worm, they can live from 4-10 years. Earthworms typically live 4-8 years, the tiger worm lives about 4.5 years, the lobworm is about 6 years. And, under lab conditions, the black headed worm can live up to 19 years.
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