Motility is the ability of an organism to move spontaneously. True motility refers to the ability of a bacterium to move using its own flagella.

*Bacillus cereus* is a Gram-positive, rod-shaped bacterium that is motile by means of peritrichous flagella.

*Pseudomonas aeruginosa* and *Streptomyces volutans* are both non-motile bacteria.