You may think of them as nothing more than an annoyance, but it turns out flies might be far more useful than you realise.

Dr. Bryan Lessard, also known as Bry the Fly Guy, spoke to Deborah Knight on the weird and wonderful ways flies mingle with hunans.

Perhaps most outrageously strange is their role in crime-solving, as Dr. Lessard told listeners on 2GB.

Hear more highlights from Deborah Knight below: