Fuente: WIPO "varroa" A method for transporting liquid with a UAV transport that includes docking the UAV transport with a first station and supplying the UAV transport with liquid from the first station. The UAV transport undocks from the first station and flies to the vicinity of a second station. The UAV transport docks with the second station and delivers at least a portion of the liquid to the second station. A UAV for use therewith and a method for maintaining a feed tray at the second station are provided.