Overview
- The study, published in mid‑June in Nature Communications and summarized by Nature and CNN, compiled field records, butterfly‑house data and lab experiments across 28 species to measure lifespans that ranged from about 14 days to 348 days.
- At least one Heliconius hewitsoni was recorded living 348 days, and many pollen‑feeding Heliconius species routinely live months longer than closely related non‑pollen feeders.
- Controlled tests that permanently withheld pollen shortened lifespan or condition in some cases but did not erase extended longevity in several Heliconius species, indicating evolved physiological mechanisms beyond nutrition.
- A functional grip‑strength assay called “The Pullinator” found pollen‑feeding Heliconius maintained body mass, muscle performance and reproductive output longer than non‑pollen relatives, showing delayed physiological decline with age.
- Authors say Heliconius provide a promising comparative model to study natural solutions to delayed ageing and plan follow‑ups on salivary enzymes, proboscis processing and neural or metabolic differences, but they caution direct relevance to human ageing remains unproven.