A fearsome looking insect which is in reality a harmless cranefly (Daddy long legs fly). The insects halters are clearly visible in this shot. Halters are used in flight control and are small dense spheres (in this case yellow) that vibrate on a rigid stalk (actually derived evolutionarily from the second pair of wings). They are attached to the body just behind the wings. These organs act like the flight direction gyroscopic sensors found in planes and rockets, and supply the insects biological CPU with the data needed to calculate its orientation in flight (perform a 'halterectomy' and you'll see some truly erratic flights).