<p>Disclaimer: There are for sure people with more expertise on this topic out there.</p>
<p>For, me it looks like a Black Rat. Compared with the appendix of the work of Newson et al. 2020, I would go with Black Rat. That corresponds with your guess and the environment.
You can check out the work <a href="https://www.bto.org/our-science/publications/peer-reviewed-papers/acoustic-identification-small-terrestrial-mammals" rel="nofollow noreferrer">here</a>, its worthwile. The Appendix gives some examples, found at the bottom of the page.</p>
<p>Cheers,
Dominik</p>

CC BY-SA 4.0
2023-10-11T12:14:23.950Z
2023-10-11T12:14:23.950Z
Dominik
<p>I am reviewing some audio recorded with an Audiomoth a couple of weeks ago in Bolivia (south America). The target group was bats, but I found these vocalizations which are unlikely for a bat due to the duration.</p>
<p><a href="https://i.sstatic.net/9GAU5.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/9GAU5.jpg" alt="Spectrogram for unknown species call, between 26 kHz - 34 kHz" /></a></p>
<p>The lowest frequency is approximately 26.7 kHz, the highest is 34 kHz, and the duration is almost 1 second. There are also a few calls that last around 350 ms. My recording lasted 5 minutes and the calls were emitted for most of the 5 minute period.</p>
<p>Since I am in the city, I thought that this could be a rodent. The most similar vocalizations I found are for rats, although the call is categorized as a 22 kHz call and has a shorter duration <a href="https://www.mdpi.com/2076-3425/11/4/459" rel="nofollow noreferrer">https://www.mdpi.com/2076-3425/11/4/459</a> .</p>
<p>Thanks.</p>

<terrestrial><species-identification><call-identification>
Help identifying the species or group for this ultrasonic vocalization (a rat?)
# Help identifying the species or group for this ultrasonic vocalization (a rat?)

(Asked by: username_0 on 2023-10-03)

I am reviewing some audio recorded with an Audiomoth a couple of weeks ago in Bolivia (south America). The target group was bats, but I found these vocalizations which are unlikely for a bat due to the duration.

[![Spectrogram for unknown species call, between 26 kHz - 34 kHz](https://i.sstatic.net/9GAU5.jpg)](https://i.sstatic.net/9GAU5.jpg)

The lowest frequency is approximately 26.7 kHz, the highest is 34 kHz, and the duration is almost 1 second. There are also a few calls that last around 350 ms. My recording lasted 5 minutes and the calls were emitted for most of the 5 minute period.

Since I am in the city, I thought that this could be a rodent. The most similar vocalizations I found are for rats, although the call is categorized as a 22 kHz call and has a shorter duration <https://www.mdpi.com/2076-3425/11/4/459> .

Thanks.

**Tags:** terrestrial, species-identification, call-identification


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## 1 answers

### Answer by username_1 on 2023-10-11. Score: 3 | Accepted answer

Disclaimer: There are for sure people with more expertise on this topic out there.

For, me it looks like a Black Rat. Compared with the appendix of the work of Newson et al. 2020, I would go with Black Rat. That corresponds with your guess and the environment.
You can check out the work [here](https://www.bto.org/our-science/publications/peer-reviewed-papers/acoustic-identification-small-terrestrial-mammals), its worthwile. The Appendix gives some examples, found at the bottom of the page.

Cheers,
username_1


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