Abstract: Stowable and deployable unmanned aerial vehicles (UAVs), and associated systems and methods are disclosed. A UAV in accordance with a particular embodiment includes a main body, frames carried by the main body, and motors carried by the frames. At least two frames are positioned to move relative to each other between a stowed configuration in which the frames are generally aligned proximate to each other and a deployed configuration different from the stowed configuration. The main body can include a first body portion pivotably connected to a second body portion. In a stowed configuration, the body portions can generally overlap each other. A UAV in accordance with particular embodiments includes a modular electronics unit carried by the UAV and including a camera, a battery, and a vehicle controller. Modular electronics units can be configured to be removably connected to and disconnected from the UAV and other vehicles.