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Eavesdropping on the Night Sky:
Eavesdropping on the Night Sky:
Acoustic Monitoring of Bats in Moorhead
Acoustic Monitoring of Bats in Moorhead
Using state-of-the-art AudioMoth ultrasonic recorders and custom-built data analysis tools, this project captures and visualizes the hidden world of bat communication. From foraging buzzes to social calls, we’re uncovering patterns in local bat behavior and activity across Moorhead, MN, USA. Our recordings reveal the rhythms of nocturnal life and contribute to understanding species ecology and conservation.
Concordia College in Moorhead is developing a program to engage both its students and Moorhead community members in recording and studying bat echolocation behavior.
The mission of the Concordia Bat Project is to unite Concordia students and community citizen scientists in studying and conserving local bat populations by leveraging acoustic technology to create unique research opportunities.
Images above generated by Gemini
Collected by Darin J. Ulness
Seeing and Hearing Echolocation
Seeing and Hearing Echolocation
The picture to the left is what is called a spectrogram for a bat echolocation call sequence that was recorded in a residential neighborhood in Moorhead, MN, USA. There are numerous foraging calls as well as feeding buzzes over a period of about 250 seconds (a little over 4 minutes).
These calls are ultrasonic, meaning they occur at frequencies higher than the range of human hearing. So we do not hear all this activity when we are out at night. With computer software we can "map" these higher frequencies into our audible range. Doing so allows us to hear the echolocation behavior. Click on the button below to hear the data that produced this spectrogram. See if you can hear the feeding buzzes!
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