Prionus Californicus, commonly known as the California root borer, can be found in many regions of Western North America. They are root borers, which can grow as large as six centimetres – and are said to be edible, if you’re brave enough. …The larvae can grow to a whopping seven centimetres long. California root borers are considered an orchard pest, and the tunnelling of larvae can cause the death of infested trees. While they look scary, adult beetles don’t bite or harm humans, other than the scare they can provide with their intimidating looks. …The insect, in both the larval and adult stages, is edible – although I doubt I will ever be that hungry in my life.