I went on a Bat Walk last week. It was a few of us, walking around the park a little after sunset, pointing our radios at rotted trees and tuning it to frequencies of 45-65Khz. You could hear the bats with their popping sounds before you saw them, tiny things snatching up insects off the surface of the water… incredible maneuverability
The park ranger had this USB sonar device hanging off his phone, which scanned the entire frequency range in fixed bins of about 5KhZ or so, and used it to identify the types of bats that we were hearing and just about seeing: Common and Soprano Pippistrellas, and some Noctules.
(src: researchgate.net/…/Peak-frequency-and-signal-dura…)
It was just a group of us, huddled in silence listening to the crackle and pops of these little guys feasting for their late evening breakfast on our radios. It was pretty magical
usualsuspect191@lemmy.ca 4 days ago
Frequencies
myotheraccount@lemmy.world 4 days ago
Came to comments just to look for this