Fluorescently labeled E. coli flagellar filaments.
Taken by: Wenlong Zuo.

E. coli swarming colony with chiral branches.
Colony branches curve in a clockwise direction as a result of unidirectional fluid flows at colony edge. See: Wu et al., PNAS 108(10): 4147-51.

An E. coli colony reminiscent of solar eclipse.
Taken by: Haoran Xu.

B. subtilis biofilm
Taken by: Wenlong Zuo

Close look of a B. subtilis colony
Taken by: Wenlong Zuo

P. aeruginosa (PA14) swarm with branches (or tendrils)
Taken by: Ye Li