“I’ve detected six species here,” said Townsend. “It’s likely that another six species also inhabit the area, given the similarity of this terrain to other study locations.” The species Townsend has documented here are the Big brown bat (Eptesicus fuscus), Hoary bat (Lasiurus cinereus), California myotis (Myotis californicus), Long-eared myotis (Myotis evotis), Yuma myotis (Myotis yumanensis), and Mexican free-tailed (Tadarida brasiliensis).” Sempervirens Fund staff have also seen Townsend’s big-eared bat (Corynorhinus townsendii), like in the photo below, elsewhere on the property. While some researchers use nets to catch and release bats or study their droppings, Townsend relies on acoustic recordings. She uses a single Pettersson D500x monitoring device with a microphone secured 20 feet above the ground in a large bay tree.