The big tooth anabrus was seen by me and my friend. I have a photo in another observation from the same day. They sounded like a sprinkler in the background, but it was an entire swarm of the Big Tooth Anabrus making the sounds. Ignore the rest of the recording it's just my friend and I talking on the hike since I couldn't figure out how to edit it out of the recording.
Here is a recording of the same species for reference: https://orthsoc.org/sina/267a.htm