Vespadelus sp. (genus)

A vesper forest bat at Greenleigh, NSW

Vespadelus sp. (genus) at Greenleigh, NSW - 6 Feb 2022 09:13 PM
Vespadelus sp. (genus) at Greenleigh, NSW - 6 Feb 2022 09:13 PM
Vespadelus sp. (genus) at Greenleigh, NSW - 6 Feb 2022 09:13 PM
Vespadelus sp. (genus) at Greenleigh, NSW - 6 Feb 2022 09:13 PM
Vespadelus sp. (genus) at Greenleigh, NSW - 6 Feb 2022 09:13 PM
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Identification history

Vespadelus sp. (genus) 6 Jan 2025 MPennay
Vespadelus sp. (genus) 12 Feb 2022 MPennay
Vespadelus vulturnus 7 Feb 2022 LyndalT

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User's notes

Upward tail on call (compared to common bentwing) and higher frequency of characteristic compared to Southern Forest bat

5 comments

LyndalT wrote:
   12 Feb 2022
The Kaleidoscope summary with max 51.52 kHz and min of 42.93 KHz and characteristic average frequency of 43.803kHz is for call 205434
The Kaleidoscope summary with max of 62.69kHz and min of 41.822 kHz and characteristic average frequency of 43.53kHz is for call 205056
MPennay wrote:
   12 Feb 2022
The frequency range is closer to typical Vespadelus regulus than vulturnus unfortunately this one is in the overlap zone, could be either.
LyndalT wrote:
   12 Feb 2022
Is there nothing i can measure to enable distinction?
MPennay wrote:
   12 Feb 2022
Sadly there is substantial overlap in bat calls and often where they overlap they are indistinguishable. Unlike bird or frog calls that primarily have social/sexual selection functions because the function of echolocation is primarily navigation/prey searching it is not necessarily species specific and sometimes species that occupy similar habitats or use similar hunting strategies can have near identical calls (at least to our poorly tuned ears)
LyndalT wrote:
   12 Feb 2022
Makes a lot of sense, thanks

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