Echolocation calls of high-duty-cycle bats (Hipposideridae and Rhinonycteridae) from Kenya

Abstract

We describe the echolocation calls of six species of Hipposideridae: Doryrhina camerunensis, Hipposideros beatus, H. caffer, H. ruber, Macronycteris gigas, and M. vittata and two species of Rhinonycteridae: Cloeotis percivali and Triaenops afer. The recordings were made in Kenya during 2013-2018, using Pettersson D500X and D1000X real time, full spectrum bat detectors. All species used highintensity constant-frequency echolocation of high duty-cycle. Most of them separate clearly in the constant-frequency component of the echolocation calls and can be recognized based on that feature alone. This study provides the first description of the echolocation calls of D. camerunensis, whereas those of H. beatus, H. ruber, and C. percivali from Kenya are also described for the first time. Additionally, call frequencies for some of these species differ from those of other parts of their range, demonstrating the need for collection and publication of more local call libraries from tropical regions.