A incognito SM4 bat detector that records ultrasonic bat calls is hidden in a mesquite tree in Grand Canyon near the Colorado River

An incognito SM4 bat detector is placed in a hidden location in a mesquite tree in Grand Canyon near the Colorado River, below Emerald Rapid. This weatherproof detector records ultrasonic bat calls. This is part of an ongoing study during a study that is examining bat abundance and foraging in Grand Canyon. For more information, see: Metcalfe, A.N., Fritzinger, C.A., Weller, T.J., Dodrill, M.J., Muehlbauer, J.D., Yackulic, C.B., Holton, P.B., Szydlo, C.M., Durning, L.E., Sankey, J.B., and Kennedy, T.A., 2023, Insectivorous bat foraging tracks the availability of aquatic flies (Diptera): The Journal of Wildlife Management, e22414, https://doi.org/10.1002/jwmg.22414. Photo by Anya Metcalfe, USGS, SBSC.