With the help of their eyes and halteres, flies are exceptional fliers. They can avoid most predators, and are the most difficult insects to capture by hand. Their jinks, dives and turns to avoid their predators is their main adaptation. "These flies do a precise and fast calculation to avoid a specific threat and they are doing it using a brain that is as small as a grain of salt"... "And they can fly like an ace at birth. It's like putting a newborn baby in the cockpit of a fighter aircraft and it knowing what to do".