How Many Generations Can a Flea Produce in One Year?

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Equipped to survive even freezing temperatures in their pupal stage, the flea's life cycle is difficult to break. Under ideal circumstances, fleas live up to a year, completing the reproductive cycle that produces a new generation every 21 to 40 days. This means that one flea can produce nine to 17 generations by herself in a year-long life, producing up to 2,000 offspring.

Factors Affecting the Life Cycle

Unless the flea lives in a warm, humid environment where blood meals are readily available, she will not produce a maximum amount of generations in a year. A flea must have a blood meal before reproducing and will usually begin laying eggs within 24 hours of consuming one. Low humidity and temperatures below 70 degrees slow the flea's life cycle.

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A former world-class swimmer, J.T. O'Connell shares her love of adventure travel, extreme sports and pets through thousands of published articles. O'Connell studied journalism at Grand Canyon University, and brings professional experience as a tour guide and travel consultant. She authors the blog, Traveling With Large Dogs.