The drone fly, Eristalomyia tenax, is a bee mimic of the family Syrphidae and order Diptera. There are three main differences between drone flies and bees: 1. Drone flies have one pair and bees two pairs of wings. 2. Antennae are shaped differently. 3. Flying postures and sounds are different. The easiest way to distinguish them is that the former has short antennae that look like small round pieces of meat, while the latter has long antennae that look like sticks.