An illustration showing use of a bat echometer and a light trap to detect emerging aquatic insects

An illustration by Diana Valentin from Northern Arizona University shows the use of a bat echometer and a light trap to detect emerging aquatic insects, along the Colorado River in Grand Canyon. This illustration was drawn for Diana Valentin's internship with USGS during a study that examined how the diversity and abundance of emerging aquatic insects affected bat abundance and foraging. 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, online, https://doi.org/10.1002/jwmg.22414.