The Daily Aus Why are there more flies right now?
Oct 26, 2025
Dr. Bryan Lessard, an award-winning entomologist and science communicator known as 'Bri the Fly Guy', chats about the surprising rise in fly populations this season. He explains how weather patterns trigger fly life cycles and reveals their crucial roles in nutrient recycling and forensic science. Bryan discusses flies' attraction to decay, their surprising pollination contributions, and debunks myths about their cleanliness. He encourages a newfound appreciation for these ecosystem workers, highlighting their fascinating behaviors and importance.
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Weather Drives Fly Emergence
- Fly activity spikes after rain and warm temperatures because pupae in soil soften and emerge.
- Adults become far more active in warmth, making spring/summer peak fly season.
Flies Recycle Dead Matter
- Blowflies exploit carrion to lay eggs and their larvae recycle nutrients by consuming rotten flesh.
- This decomposition returns nutrients to soil and prevents waste buildup in ecosystems.
Forensic Entomology Sparked His Interest
- Bryan discovered forensic entomology and blew his view of flies when he learned blowflies help estimate time of death.
- That sparked his career studying and defending flies.