The width of circumferential F-actin bands in utricular supporting cells of the sensory epithelium and cells of the nonsensory epithelium remains narrow throughout life in chickens. A-C) 2-D projections were taken of stacks of high resolution confocal images (63x 1.4 NA objective) from phalloidin-stained utricles of chickens at postnatal day 0 (P0), P13, and P365. The transition from sensory epithelium (S) to nonsensory epithelium (NS) shows that the width of F-actin bands between these two regions apparently remains narrow as chickens age. Scale bar for A-C in C, 30 μm. D-I) Higher magnification images of the S and NS from the frames in A-C show that the bands (white arrows) remain within close spatial proximity to the junctions in both regions. Scale bar for D-F in F, 5 μm. Scale bar for G-I in I, 5 μm.