Impressive, what settings used on AudioMoth to make the recording and was any filtering or other post processing used to generate this track?

The calls of a Western pipistrelle or canyon bat after being slowed down and having its frequency lowered. Photo by Daniel Neal via Flickr / Creative Commons.

Canyon Bat Calls

The calls of a Mexican free-tailed bat, adjusted for human hearing. Photo by USFWS/Ann Froschauer via Flickr / Creative Commons.

Mexican Free - Tailed Calls

The calls of a Western mastiff bat, recorded in Griffith Park. Photo by Daniel Neal via Flickr / Creative Commons.

Western Mastiff Calls

Hoary bat call recorded in Griffith Park. Photo by Daniel Neal via Flickr / Creative Commons.

Hoary Bat Call

Time Expansion recording from what I think is an Eptesicus serotinus. I could see it hanging from the facade of a large flat. It was hanging on the 10the floor and it has been hanging there for at least 45 minuten. All the four times I visited that site it has been calling like this in a "stationary way. I heard no capture buzz or something like that.  It sometimes flew for a few seconds just to land on another spot. It once flew and started calling at the other side of the building - for a short period. 
(I collected fresh droppings right underneath the spot were he was hanging, so maybe DNA-analyses will tell us more.

0829 233419 Bat Stationary Calls

Bat Calls Stretched

test_case_recording.WAV

Time-expanded samples of Brazilian free-tailed bats (Tadarida brasilensis) recorded in San Francisco, California.  The first file, Kim's bats, is a compilation of different recordings including social calls and feeding buzzes near a roost in the city.  The others were recorded there or in different city parks.  All recordings were made with Pettersson D240X detectors.

Kimsbats

These are are a few sample recording from a custom made device called AudioMoth. The device is capable of recording sounds from the audible to ultrasonic frequencies. To find out more click the AudioMoth link below.

test_case_recording.WAV

Open Acoustic Devices

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