Who Made This Sound? Mary environmental club, Photos, refuge, School March 13, 2012April 19, 2014Edwin Forsythe Wildlife Refuge, environmental club, field trip, mystery sound, students 16 Comments Click here for secret sound! Click on the sound file above, then post your answer in the comments section below. Here are some photos to give you an idea. Oh, one last hint, we may hear these critters at the Refuge on Saturday! Remember, only one answer is correct!