The Nose Knows: A Review of the Diversity, Form, and Function of the External and Internal Features of the Bat Nose

Dr. M. Brock Fenton has been intrigued by the diversity of bats throughout his long career, and has combined his research and photography skills to capture the extensive morphological diversity found across the Order Chiroptera. In this paper, we honour Brock’s fascination with diversity by conducting a review of the external and internal characteristics of the bat nose, a morphological feature that Brock’s photographs have beautifully captured in many bat species. Specifically, we explore variation in form and function of the bat rostrum and its role in respiration, echolocation, and olfaction in bats, with an emphasis on the noseleaves of nasal-emitting echolocators, as well as how turbinate morphology may be impacted by nasophonation. While our review is not an extensive dive into all that is known about bat noses, our goal is to highlight the diversity we see in form across the Order Chiroptera, while exploring how function has been shaped by selection, particularly in relation to mode of echolocation signal emission.