Expandable decoy unmanned aerial vehicles (UAVs) are disclosed. A disclosed example decoy UAV includes an expandable body at least partially defining an exterior of the expandable decoy UAV, an expander to expand the expandable body to a desired footprint, and a propulsion device operatively coupled to the expandable body, the propulsion device to move the expandable decoy UAV.

An unmanned aerial vehicle (UAV) system includes one or more processors and one or more computer storage media storing instructions that when executed by the one or more processors, cause the one or more processors to perform operations that include obtaining flight information of the UAV; determining one or more modifications based on the flight information; and transmitting data messages over data buses based on the one or more modifications.