This video was filmed in Barcelona in August 2011. It shows the first public testing of the Ant Ballet Machine. Using synthesised pheromones (Z9:16Ald Hexadecanol) and highly invasive Linepthinema humile Argentine ants, a robotic arm lays pheromone powder trails that cause the ants to behave in a different way to their usual foraging. Performances in late 2012 feature mass colony movement testing, and the first intercontinental ant ballet.