Myotis macropus FS call

Leroy Gonsalves

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Mar 6, 2018, 4:16:48 AM3/6/18

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Hi everyone,

Just thought I'd share this FS call from Myotis macropus. I don't look at a lot of calls in FS. Just wondering if anyone has any ideas what the fainter pulses (50-95 kHz) are between the 40 ms and 110 ms marks in the attached screenshot? The .wav file is too large to attach.

Cheers,

Leroy.

Myotis FS screenshot.JPG

Michael Pennay

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Mar 6, 2018, 4:30:38 AM3/6/18

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Hi Leroy,

Im not sure if the call is displayed in real time? The quieter pulses appear very much like another bat, they dont appear to synchronise in time, shape, or frequency, so they're not echoes. They also dont appear to be recorder issues like aliasing

So I'd say another, quieter bat. Because the call is quieter its probably further away from the detector and elements might be missing (especially higher frequencies which will have attenuated).

Michael

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Michael Pennay

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Mar 6, 2018, 4:34:14 AM3/6/18

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Closer look, there do appear to be echoes at 95ms and from 130ms beyond.

M

Stefan Nyman

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Mar 6, 2018, 4:35:04 AM3/6/18

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Can you send the wav-file to ste...@chiroptera.se ?

^ö^ Stefan

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Leroy Gonsalves

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Mar 6, 2018, 4:56:45 AM3/6/18

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Thanks Michael for the feedback. The call was displayed in compressed mode. In real time (attached), the fainter pulses look like they're present from search phase through to a feeding buzz.

Leroy.

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Myotis FS screenshot_realtime.JPG

Michael Pennay

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Mar 6, 2018, 5:06:03 AM3/6/18

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Aaaah! real time - that's more like it.
My big tip for call analysis- if any questions look in real time.

I withdraw my previous assessment - and offer this one- the pulses look like echoes to me - in compressed time the lower frequency component has been clipped by the next pulse.
But in real time you can see they closely match the timing of each pulse.
The higher max frequency recorded may actually 2nd harmonic 45khz H1 90khz H2

M

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Leroy Gonsalves

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Mar 6, 2018, 5:18:59 AM3/6/18

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I see what you mean now.

Ta - Leroy.

kyle armstrong

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Mar 6, 2018, 6:15:09 AM3/6/18

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yep, echoes and f2 harmonic.

Best regards,

Kyle
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr Kyle Armstrong
Specialised Zoological ABN 92 265 437 422
Mobile phone: 0404 423 264 (international +61-404-423-264)
Post (home office): 7 Palmerston Road, Unley, South Australia 5061.
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Website: http://szool.com.au

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On 6 March 2018 at 21:05, Michael Pennay <vespa...@gmail.com> wrote:

Stefan Nyman

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Mar 6, 2018, 5:44:47 PM3/6/18

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Really agree!

Wonderful long recording

Attached is a Batsound representation.

Cheers

^ö^ Stefan

Från: kilo...@googlegroups.com [mailto:kilo...@googlegroups.com] För kyle armstrong
Skickat: den 6 mars 2018 12:15
Till: kilo...@googlegroups.com
Ämne: Re: [Australasian batcall group: 374] Myotis macropus FS call

yep, echoes and f2 harmonic.

Best regards,

Kyle
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Dr Kyle Armstrong
Specialised Zoological ABN 92 265 437 422
Mobile phone: 0404 423 264 (international +61-404-423-264)
Post (home office): 7 Palmerston Road, Unley, South Australia 5061.
Email: kyle.n.a...@gmail.com

Website: http://szool.com.au

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

On 6 March 2018 at 21:05, Michael Pennay <vespa...@gmail.com> wrote:

Aaaah! real time - that's more like it.
My big tip for call analysis- if any questions look in real time.

I withdraw my previous assessment - and offer this one- the pulses look like echoes to me - in compressed time the lower frequency component has been clipped by the next pulse.
But in real time you can see they closely match the timing of each pulse.
The higher max frequency recorded may actually 2nd harmonic 45khz H1 90khz H2

M

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image001.jpg

M500_20180303_200040.png

Leroy Gonsalves

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Mar 7, 2018, 2:39:51 AM3/7/18

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Thanks Kyle and Stefan.

Yes, the calls were recorded with a Pettersson M500. Very happy with how it works. Just wish it could connect directly to a device without a cable.

Cheers,

Leroy.

Sent from my Windows 10 phone

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