Integration between unmanned aerial system and unmanned ground robotic vehicle are disclosed herein. One variation of a robotic system may generally comprise an unmanned aerial vehicle (UAV), an unmanned ground vehicle (UGV), and a base station configured to receive the UAV and replace a spent power supply cartridge from the UAV and further having a charging mechanism configured to wirelessly transfer power to the UGV when the UGV is positioned in proximity to the charging pad.