Hi everyone. I am suuuuuper late on this discussion but I just finished 6-month fieldwork deploying 18 SM Micro over 70 different locations in Java, so I thought I would like to share my opinion on this device. So my work is basically installing each recorder in one location for the duration of 7-14 days before moving it to a different location, with battery and silica gel changed in between every deployment. Here's my thought:

Waterproofing - The first 2 months of the fieldwork was the wettest season I have ever experienced in the field. Extreme rain almost on a daily basis. Most of the time the recorder was working just fine except for the 2nd week of deployment when I found the inside a bit wet, but it was probably because I forgot to ensure that both lids were clicking.  The recorder still works fine after this deployment, and this was when I decided to change the silica gel before the next deployment.

Sound quality - As mentioned by others. there's an annoying peak at 6kHz. I did not originally plan to do soundscape analysis so it wasn't a big problem at the beginning, but now there is some discussion on doing so. Other than this I found the quality to be just adequate.

Battery Life - I am using alkaline 1,5 volt (non-rechargable) battery and get ~120 hours of recording, with a sample rate of 32khz. Suitable for my method, but certainly not for longer deployment.

Safety - My field site is full of a poacher who does not like to be detected, and the rangers warned me so many times about the camera trap that was destroyed or stolen by these people. I used steel cable and a small carabiner-style padlock which I later realized wouldn't stand a chance against a few hits of the machete, but luckily no recorder went missing--mostly because I tried to hide it as far as possible from the trails and cover our tracks. The small size of SM Micro makes it easy to hide among foliage (be careful on contact noise between leaves and recording), and the fact that it is colored green and has no external light also greatly helps (unlike Swiftone. Seriously, who thought that white is a perfect color for an expensive device that will be left in the forest for a long time?)

In conclusion, it is a cheap and easy-to-get device (compared to the mythical Audiomoth) for species presence detection in a short time like I did, but certainly not for longer deployment or more intricate bioacoustic analysis. 

Hi everyone, 

I wanted to provide an update on behalf of Wildlife Acoustics regarding some of these comments in this thread. As some of you may know, we have just announced the second generation of our Song Meter Micro. Along with 33% longer battery life due to an expanded battery tray (which now holds 4 AAs instead of 3), the Song Meter Micro 2 will also have a flatter frequency response. Though we don’t have a firm release date at the moment, we are currently looking at an early 2024 release, with pre-orders likely to start at the end of 2023. Detailed frequency response charts and specs will also be posted to our site soon. In fact, we have built an anechoic chamber in our new office and will be doing detailed testing with a host of new precision instruments. For more info on the Micro 2, check out our current product page. Lastly, thanks all for your open and honest feedback. It allows us to make our products better and better for you. 

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Hi Kennedy, this is Ben from the USGS. There are many ways to monitor stream flow, but most are expensive and time-consuming. We have recently come up with an alternative that uses cameras and images combined with AI to estimate relative flow. There is a growing database here: 

Read "" on

Feel free to get in touch if this seems like it could help, Ben at bletcher@usgs.gov

Would you consider using LoRaWAN technology? 

LoRaWAN features super low power consumption and ultra-long-range communication, very suitable for the wild :) 

One LoRaWAN gateway can connect to up to 200 sensors within the range of 2km to 10km (depending on the environment and antenna etc.) 

You can check out the combination of the following: 

(1) liquid level sensor  + LoRaWAN data logger  

(2) LoRaWAN outdoor gateway 

Not sure exactly how your telemetry will be deployed, but if it's going to be attached to an animal in a relatively non-invasive way, you might check with zoos or aquariums that have similar species. 

I worked in that industry for a long time and we tested telemetry for seals, sea lions, polar bears and elephants. There might have been more, but that's all I can think of off the top of my head. This can help improve attachment methods and test how tough the animals will be on the equipment.