There are two types of Hummingbird drones. First, the famous nature-mimicking AeroVironment Nano Hummingbird, developed under a grant from the Defense Advanced Research Projects Agency. Then there’s this one, which looks more like an enormous, six-propelled pressure cooker. Reference Technologies is marketing this Hummingbird Il for airborne delivery and situational awareness. It has a ceiling of 14,000 feet and a top speed of 60 mph.