Summary Pseudomonas aeruginosa exploits several types of motility behaviours to colonize diverse environments. One of these is swarming motility, a coordinated group movement on a semi‐solid surface. This bacterium needs to express a functional flagellum and produce rhamnolipids to display this type of social motility. A Δ hptB mutant, a gene part of the Gac/Rsm signalling pathway, produces rhamnolipids and expresses a functio...