Bats are agile flyers and this capability is made possible by both sensory and musculoskeletal adaptations, including echolocation, their muscle-actuated, many-jointed wings, and their specialized wing membrane. Previous studies have noted the presence of sensory hairs on the membranes of bat wings and explored their function, suggesting these may act as airflow sensors. However, research on the distribution of these hairs across wing regions and bat species is limited. In this study, we aim to address these gaps through comparative analysis of sensory hair distribution on the wings seventeen bat species from ten families, representing much of extant bat diversity. We measured hair area density (hairs per cm²) from high-resolution auto-fluorescence micrographic images by counting sensory hairs in specific regions of the wing, identified by anatomical landmarks. We performed phylogenetic and non-phylogenetic statistical analyses to determine if sensory hair density differs among selected wing regions and among species, and to explore potential correlations between sensory hair distribution and ecological parameters. We found that hair density generally decreased from proximal to distal along the wing. Forearm length, a proxy for body size, negatively correlated with hair density, though this pattern was accounted for by body size-phylogeny covariation. Species in the family Molossidae (Tadarida brasiliensis and Molossus rufus) differed greatly from others, and displayed much higher hair density in the proximal region of the wing than other species in this study. Ecological factors such as feeding guild did not relate to hair distribution on the wing after phylogenetic correction, suggesting that phylogeny is the primary driver of variation in hair density among species in our sample.