Innovation: Belly gunk from forest flies used to survey forest animals - Smithsonian Insider (blog)

Innovation: Belly gunk from forest flies used to survey forest animals Smithsonian Insider (blog) The next time you swat a fly ponder this: inside its belly is the DNA of whatever it ate before landing on your picnic dinner—roadkill, animal droppings or blood from an open wound. Whatever a carrion fly swallows stays in its stomach for some time, a ...