The emerging area of intelligent unmanned aerial vehicle (UAV) research has shown rapid development in recent years and offers a great number of research challenges within the artificial intelligence and knowledge representation disciplines. In my talk I will present some of the research currently being pursued and results achieved in our group at Linköping University, Sweden. The talk will focus on artificial intelligence techniques used in our UAV systems and the support for these techniques provided by the software architecture developed for our UAV platform, a Yamaha RMAX helicopter. Additional focus will be placed on some of the planning and execution monitoring functionality developed for our applications in the areas of photogrammetry and emergency services assistance. The talk will include video demonstrations of both single and multi-platform missions and a possible live demonstration of a micro-UAV, the LINKMAV, developed in our group.