A Quick Review of the book: 'Is That A Bat?' by Neil Middleton

Book Review: 'Is That A Bat?' by Neil Middleton

'Is That a Bat?' is a book which intrigued me since I first learned of it (probably while pursuing books on the NHBS site).

Okay, I decided to just simply google: is that a bat by Neil Middleton

Exactly as it reads above, with no capitalization, and no question mark, just to see what would happen. The 1st link listed is of the same title, from 'goodreads' where it states "5/5" (Rating).

Below that, is the link to the publisher Pelagicpublishing.com And below that, is the link to the book on amazon.

Some details:

The complete title of the book is: Is That A Bat? A Guide to Non-Bat Sounds Encountered During Bat Surveys 

It is available in paperback, or e-book (electronic) format. It was published on January 6, 2020. It is 288 pages in length, with 257 figures (illustrations), and 36 tables. 

It features 7 chapters: 3 appendices, a glossary, references, and an index.

It measures 234 x 156mm and weighs 650 grams.

I may be getting a little ahead of myself here, but this is how the table of contents reads:

Table of Contents

Preface
Acknowledgements
The Sound Library
1. Well, what on earth could it be?
2. Terrestrial mammals
3. Birds
4. Amphibians
5. Insects
6. Electronic and mechanical
7. Weather, people and other nuisances
Appendix 1 Supporting figures and tables
Appendix 2 Problem solving
Appendix 3 Additional resources
Glossary
References
Index

The price varies a bit depending on where you order from, and especially which format you choose; but NHBS currently has the paperback, in stock and available for only £34.99

This book would be quite suitable for a range of readers: Anyone from a hobbyist or citizen scientist, all the way up to professional bat workers and researchers - There is something of interest for anyone who works with bat detectors.

...Now, once I got myself (an electronic) copy, and started to look through it - Wow! I realised straight away that this review might not be so quick and easy:

Not only is there a lot of great info packed into this book; but when you buy a copy, you get access to on online sound library! (via the publishers site). I had no idea, and was pleasantly surprised by this. 

Several of the first sounds & spectrograms, are presented in a quiz/self-test format. This thoughtful inclusion helps make this book a real learning experience.

The next thing that dawned on me, was this book would also be excellent for those involved in wildlife sound recording in general. Definitely a nice cross reference, which is also pleasant to read. As I continued reading, I found myself thinking about getting my own recording equipment out...I eventually did in fact!

When visiting the dealers websites, you will commonly see some sample pages of the book made available, as a preview. The Author uses graphs, and other useful illustrations. As well as some very useful spectrograms & screenshots of various recordings. These were made using Pettersson's BatSound software (from Pettersson Elektronik). 

I found the illustrations to be lovely.

What I liked: 

• A very thorough book!

• Well written, and put together in a logical progression.

• Along with it's online sound library, it is reminiscent of having a course in wildlife sound recording.

I enjoyed 'Chapter 5 Insects', the order orthoptera was discussed (which includes crickets, katydids, and grasshoppers). As a long time fan of singing insects, I liked the included oscillograms  & spectrograms. As well as the concise facts shared about each species mentioned. 

This treatment is repeated when the subject of amphibians is covered, as well as: Small and large terrestrial mammals, birds, and rodents. To a lesser extent (for obvious reasons) even 'Electronic and Mechanical' sounds are touched on in Chapter 6. Very interesting stuff!

I was also happy to see the appendices (neat stuff), and suggestions for further reading. In Appendix 3 for instance, the Author shares some very neat websites.

Considering the wide range of acoustic subjects covered: mainly the animals which are also recorded while one is focusing on bats - This book would be great for anyone venturing into the field - both figuratively and literally!

Without a doubt, anyone who intends to record bats in their natural environment, would do well with a copy of this book. You may also be interested, in seeing the assortment of books dealing with bats, currently offered by Pelagic Publishing here.

Until next time (when we'll be discussing bat detectors), 

Happy bat detecting!

Two Wonderful Bat Detectors Are On Their Way!

Just a quick post for now - I'm excited to announce that two unique bat detectors are currently on their way here!

To make it more fun, I'll only share a few clues and hints (for now): 

• They each have lovely, colour touch screen displays, featuring live spectrograms!
• One from the Netherlands, the other from Germany.
• Both from non profit entities (I had to purchase them).
• Chances are, you've never even heard of, or seen either of them.
• The one from the Netherlands, is a DIY kit which will require soldering.
• I've been wanting to get the one from Germany since at least 2019.

The DIY bat detector kit from the Netherlands, is currently out of stock - With no ETA as to when kits will be available again. So, there's no point in discussing it any further at this point in time. 

The bat detector from Germany is in stock & available for purchase. So, I'll tell you a little bit about it:

It's The SSF BAT-3 from Microelectronic Volkmann 

The very neat-looking SSF BAT3

Check out the All About Bats page - Originally in the German language; most of the related web pages are (using the Google Chrome browser provides auto-translate).

The SSF BAT3 provides live spectrograms

in a very compact size

That's it for now! Of course there will be lots more to share over the next few days!  Including more pictures, and links!

Happy bat detecting! 

Review: The Newest Echo Meter Touch 2 (Non-Pro Version) From Wildlife Acoustics

From Wildlife Acoustics 

So, here's a bat detector which needs no introduction... The Echo Meter Touch 2

Stock photo from Wildlife Acoustics website.

This is how the unit arrives, double-packed, directly from Wildlife Acoustics.

Very well protected inside the cardboard box

The Echo Meter Touch App, is what you download for free, from the Google Play site online - In order to operate the unit on your cell phone. All units manufactured after 2021, will have a USB—C connector.

It's important to keep in mind that a USB—C to Micro—USB, or Micro-USB to USB-C adapter may also be used...These are inexpensive, and readily available. Any adapter used, should conform to the On The Go specification.

The Echo Meter Touch 2 is very small and light, some would say amazingly so!

One of the reasons why I mention this specifically, is because it seems to me, to be even lighter than any of it's predecessors.

At the time of this writing, it is selling for $179 US dollars — directly from the Wildlife Acoustics website.

The echo meter touch 2 in it's protective carry pouch

(very neat!)

You will find that the echo meter touch 2 is very reasonably priced, and available from many different sellers — online. Including NHBS in the British isles; and Wildlife & Countryside Services.

It doesn't take very much practice before becoming comfortable using the echo meter touch app. You are able to easily toggle between compressed and expanded mode, using the icon on the main monitoring screen.

Remember to configure your Auto ID mode. Enter the Auto ID mode: and select from North America, Europe, United Kingdom, Neo Tropics, and a South African region (should be available in the latest version by the time you're reading this).

There is also a small manual record button — Red, and marked with an M. — which you can use to initiate a recording..... This button may be used on its own — or while triggered recording is in session... This is helpful in case the trigger misses something. You may read more about this in section 2.5 of the User Manual.

As always, I recommend reading the the freely downloadable User Manual — preferably in it's entirety!

You also have the ability to stop the recording label icon to open the notes page. Voice and text notes are saved as metadata in the recording, and they are transferred along with the recording to your PC. You can later use the search feature, to search the text of any text notes you had may have added.

The app has a limit of 10,000 recordings— after that, recordings will need to be transferred or deleted.

Another interesting feature is that in live mode, heterodyne can be tuned automatically or manually.

In GPS view: you can see the different locations, since each recording session is shown with a different path colour.... The KML file is generated and stored with the session, in the session folder.

I'm glad that you are able to adjust The Real Time Expansion on a previously made recording. 

In order to adjust pitch (1/10 is higher pitched [and the one I prefer] and 1/20 is lower pitched).

The nightly sessions mode is very neat, and behaves as a sort of unattended recording mode. Nice.

There are several methods of transferring your recordings onto a computer. You may use WiFi, a USB cable, or email. I experimented with all of them.

Part 5.2 of the user manual discusses audio specifications, of both the EM2 and the EM2 pro. Very informative, as you would expect.

You can also have a look at this page, on the Wildlife Acoustics site; which shows a neat side-by-side comparison - between The EM Touch 2 and The EM Touch 2 Pro.

The Echo Meter Touch 2 is very easy to use; and would be ideal for a beginner, or just about anyone interested in listening to, and/or recording bat calls.

And as always, I recommend the EM Touch 2 Pro to those who prefer better performance and features.

You can use The EM Touch 2 to save triggered recordings to .wav files. You may listen to the recordings, in either RTE (Real Time Expansion), HET (heterodyne), or traditional Time Expansion. In other words, while recording —Or while listening to the recorded files on your phone.

You can use the Touch, to transfer recordings to your computer. The app bundles the recordings into a zip folder, and allows downloading by entering a short URL into any web browser.

The screenshot below, shows the spectrogram of Lasionycteris noctivagans, a species of Vesper bat, here in The Northeastern United States:

 

A recording of a Silver-Haired Bat, made with The EM Touch 2

Viewed using Kaleidoscope, and Zoomed-in on a bit.

Pros:

* Price: Reasonably affordable, considering what you get (providing that you already have an Android cell phone).

* Easy to use, with a lot of features - not the least of which is Auto ID.

* Lightweight and robust.

Cons:

* Speed and responsiveness are directly related to the speed and responsiveness of your cell phone (new, fast phone = fast bat detector).

* Audio output isn't very loud. On the late model Samsung cell phone I used, I found myself wishing it was much louder.

So, the other minor Con, would be that it's no longer manufactured for use on any Apple devices.

Note: When rushing out to detect bats using the default settings (presuming you're recording bats in rainy conditions - from a dry refuge!): You will hear light rain / raindrops being registered. 

This may be remedied by making adjustments in the frequency response parameters - Basically the "window" of frequencies you allow the unit to record - An incentive to become familiar with the customization's The Touch is capable of; as well as The User Manual in general.

Which all serves to help you get the most out of The Echo Meter Touch 2.

This pretty much sums up The echo meter touch 2 (non pro edition). I plan to add some more info to this review in the near future; along with some recordings, et cetera.

Thank you to Wildlife Acoustics for providing the unit for review! The EM Touch 2 has been sent to The BatAbility Club (in Scotland) - Where it will be featured in an upcoming free giveaway—For BatAbility Club members!

Until next time, Happy bat detecting!

Random Thought for July

I'm running a bit behind schedule with these random, Random Thoughts Posts...

I'm just going to skip June - So here's July's Random Thought:

Can your favourite hobby stand-up against occasional set-backs? Can your chosen hobby withstand the slings and arrows of outrageous fortune?

What about disappointment after disappointment?

Well, I actually went through some similar situations, to those I've alluded to above... However, my bat detecting wasn't the hobby! In fact, while on the subject, I should point out that my love of bat detecting has been put to the test (over the past 12 years) ...and has obviously survived unscathed. 

No, in my situation, the hobby whose feet were held to the fire was Amateur Astronomy.

Spoiler alert: My astronomy hobby didn't "survive".

I'll make a long story short - I was on the precipice of really taking the plunge into visual astronomy/observing (and pencil sketching Deep Sky Objects) again. 

I was making preparations for many weeks. I was slated to receive not 1, but 4 vintage telescopes: A dream come true for many amateur astronomers any way you slice it. These weren't just old telescopes, but models which are much-sought-after. In addition: I was getting these telescopes for a very modest cost, they had each been meticulously restored & cared for, and were owned by someone who wasn't only a expert astronomer, but a bona fide Scientist (he was also a very nice guy).

I was obviously very excited about receiving these instruments; and made plans for where each would reside, when & where they'd be used, etc. I was doing more than just counting the chickens before they hatched...I was organizing them as well.

Unfortunately, with the passage of time, small "hiccups" in the logistics of the situation ensued: Some expected (inclement weather), some unexpected... And as these obstacles waxed and waned, my interest and dedication to the hobby itself simply waned. In fact, it gradually waned until I'd lost not only hope, but just about all of my interest in the hobby altogether. It just happened.

So I eventually ceased my (formally incessant) pursuit of acquiring these instruments. And declined the offer to go through with the purchase/acquisition of the telescopes.

All-in-all it seemed to me, to be an interesting chain of events. For instance, there were many ways to look at the situation. As well as other options available to me... For example, I could've simply purchased a modest, brand-new telescope. Although the choices/selection were very dismal at that point - due to the trucking/shipping shortage in The USA at that particular time.

The take away from all this, is that I reached a point where I was done with it. I'd gone from the very lofty heights of excitement, joy and expectation, to the very dismal lows of losing hope. I found myself not wanting to be involved (or active) in this particular hobby any longer.

One of the odd things about it, is that I couldn't foresee this happening. I was fortunate enough to have the space to safely house the telescopes; and the great fortune of dark skies. Yet it happened anyway. 

In some strange way, I may be glad that it happened. Going through this ordeal of highs & lows, frustration, etc., literally forced me to reassess the importance/value which that pastime represented to me. It forced me to seriously asses the situation, and cut my losses. 

Bat Detecting Forever!

The next review here, will be of the very latest Echo Meter Touch 2 (with USB-C connector) from Wildlife Acoustics. 

Happy bat detecting!

The Newest Echo Meter Touch 2

The very latest version of the echo meter touch 2 (from Wildlife Acoustics) has arrived.

This will be the version of the EM Touch 2 going forward (with USB-C connector).

I will be discussing this new unit, during a webinar on July 25th, on BatAbility Club, with Neil Middleton.

Happy bat detecting!

Random Thought Of The Month - May

Running a bit behind this time, with my Random Thought of The Month". This is the random thought for the month of May 2022.

This time, it has to do with technology — more specifically, the technology that we all use everyday: Even more specifically, laptops.

We've probably all heard (or overheard) that expression: "I need a new laptop". Sometimes, prefixed with the word "mom" or "dad" — as in "Mom I need a new laptop! "

In my experience, the person making this statement, is usually someone who doesn't have an understanding of how a laptop operates. They have no idea of what goes on inside a laptop, or even the rudimentary relationship between hardware and software... And in fact, typically have a very limited knowledge of what might be causing their current laptop to behave poorly — Or, "slow" (the most commonly heard complaint).

This complaint is normally made by someone of millennial age, or younger. Although I've also heard it from senior citizens, as well as from people of varying ages.

I must point out, straight away that as part of this discussion — I am not including (considering) any of the end users, clients, etc., whom I'd been tasked with providing computer support to (over the many years of my career). Here, I'm only discussing Family, friends, and acquaintances.

The gist of the situation, is as follows: We have a person, who has simply been using their laptop - Without any idea or care as to it's upkeep... This goes on for some time; after which a laptop invariably begins to slow in it's computing performance. To the impatient, and somewhat spoiled amongst us - this is unacceptable — And a clear indication (as far as they're concerned) that they need a new laptop.

Those with even a cursory knowledge of laptops, have a bit of understanding as to why this happens. And probably even have a vague idea of the machine being in need of some maintenance, etc.

However, someone who is not accustomed to waiting a few extra seconds for anything, begins a slow descent into desperation (and anxiety) over the need for a new laptop.

There are also some additional, amusing tidbits to consider:

• Not only is there nothing physically wrong with the laptop, but it invariably tends to be a higher end model (retailing well north of $1,000 [US]). Sometimes, easily twice as much.
• The owner of said laptop, spends 99% of their time just surfing the Web. Spending time on social media, and/or playing games, etc.
• I've also witnessed a lot of maltreatment of the laptops themselves - Neglecting to place them on hard, flat surfaces: So that the built in vents (and cooling fans) can have access to ambient air. This in turn, forces the machine to run at higher temperatures then it should — causing wide variations in thermal cycling. 
• In addition to a myriad of minor (compounding) issues and unnecessary wear, this eventually causes what is known (to computer engineers) as "chip creep".

Further to the above, consider the practice of placing laptops on pillows, bedding, blankets, and sheets. Not good.

What typically happens in the aforementioned scenarios, is that the person almost immediately orders a brand new laptop.

I suppose the thing that sticks out to me most, is the lack of productive output —From those usually found in these scenarios. It is the striking contrast, of someone having an expensive/high end tool — Who uses it just to idle away the time.

All while there are many other people, who are struggling to actually produce work —And are forced to use sub—optimal equipment.

As for me, I have always tended to buy affordable laptops. And, having been a computer engineer for about 16 years, I'm able to get them to continue functioning well past their "expected" life span. For those unfamiliar with the accepted business model — that translates to 3 years. Sometimes 2, if it's a very lucrative business or company.

Where many other (private citizens) would have already replaced theirs, twice.

In my case (personally) I will keep a tablet or laptop in continuous use for 8 or 9 years.

Most recently, I'll take a "hand-me-down" laptop from someone. It's a similar scenario —The original owner feels that the laptop isn't good enough for them, or not fast enough for them.

It happens all the time...

This reminds me of a story I once read — A journalist went to spend some time Birding in Costa Rica. His contact/guide there, lived very close to the jungle. This journalist/visitor considered himself an excellent birder... But soon discovered that his host had uncanny, and extraordinary skills as a birder. Not only when spotting and identifying birds using binoculars. But also by ear! He'd never seen anything like it before and was beyond impressed! 

The journalist also soon found out, that this man accomplished all of this - Using an old, cheap, pair of binoculars with a cracked objective lens... And a single, rudimentary field guide (which was beyond well worn).

If I remember correctly, the journalist left the man a new pair of binoculars before leaving.

Incredible — I'm amazed by stories like that. I only wish I still had some information about the article — so that I could share it here.

...and that's how it goes sometimes.

Until next time,

Happy Bat Detecting!

Review: The Batlogger S2 Static Bat Recorder from Elekon

The latest static bat recorder from Elekon, is The BatLogger S2.

Packaging - It arrives in a small, brown cardboard box. And includes a 16GB MicroSD card (installed).

The Batlogger S2 measures 132x72x35mm, and weighs 138 grams.

As just one example, The BatLogger S2 is currently priced at £660 on the NHBS website:

This static bat recorder doesn't have a built in GPS, but rather gets it's location data from the App running on your smartphone.

The Batlogger S2 does have a temperature sensor, and internal rechargeable battery. And a weatherproof enclosure.

It's listed as having a 100 hour recording time (as per Elekon).

I find the design to be a good shape (geometrically speaking). Fairly easy to mount, etc. (although mounting straps aren't provided).

I found the plastic construction of The BatLogger S2 to be less robust than other recorders of it's type on the market.

Additionally, I found the (round) mesh-like covering over the microphone element to be inadequate:

During my brief test period, I found that it allows ambient moisture to enter/contact the (delicate) Mic element. Despite taking additional measures to avoid this.

Elekon advises the user not to mount the S2 in a manner which allows the Mic area to face falling rain.

In other words: avoid exposing the Mic to direct rainfall/raindrops. 

The microphone is a MEMs type element. The Mic board, as well as the system itself utilizes the ubiquitous surface mount technology, which most PCBs use these days. 

Perhaps designing the microphone to sit in a more recessed location, would help avoid direct exposure to rain, etc.?

In use, The S2 is able to be reset (essentially the password) by subjecting the unit itself to motions and/or taps.

This of course, suggests an internal motion sensor.

Elekon's (free version of) BatExplorer (2.1) Sound recording analysis software

Locating, and downloading was Elekon's analysis software was easy.

Installation was also quick. The initial launching of the software took a little while (especially when compared to similar Apps). Many are familiar with this "phenomenon"; and some of us know exactly why it occurs (computer geeks, that is). 

Subsequent launching's of the application were much faster.

I happened to already be quite familiar with The BatExplorer software...

However, the interface has changed...for the better, I'd say: I like the way it looks now...

It does take quite a bit of time to load (a folder) of recordings...

The S2 should be considered by anyone needing a static bat recording solution.

The Batlogger S2 is especially well-suited for someone in need of a physically smaller device. 

You will need to plug the S2 into a standard USB power source (laptop would be ideal; a cell phone charger will also work).

My unit arrived with a flat battery (0% charge). I used a Samsung brand phone charger to charge The S2. This charger, which I had to hand, happened to have the USB-C connector - which is what's required when charging the S2. Unfortunately, a USB-C charging cable is not provided.

I plugged the unit in at 7:30 PM, and 2 hours later - It was only showing 20% charged (via the Batlogger Control phone app).

Just an observation: The built-in thermometers (there are 2) on my unit, consistently mis-reported the temperatures. 

One of the built-in thermometers records/reports the temperature of the S2 itself. The other, reports the ambient temperature...

Pros:

• BatExplorer software and Controller App are free 

• Scheduling / Set-up is straightforward.

• Small size / Light weight

• Microphone is replaceable / and inexpensive

 

Cons:

• Not as robust in inclement weather as it could be.

• MicroSD card requires a “config-type” file to function.

• Control software is limited.

• Relatively expensive, compared to others.

Happy bat detecting!

The Batlogger M2 From Elekon - Updated 10/13/2022

The Batlogger M2 From Elekon

The BatLogger M2 comes to us from Elekon AG, in Switzerland. It is a high-end, professional bat detector; and possesses many advanced features.

It is very versatile, and is very well adapted not only to active bat recording (during bat walks, transects, etc.) but also for nightly passive recording. I find this both an excellent and very welcomed feature. Whenever testing and using bat detectors over the years, I always use them in this fashion (overnight/unattended recording). So, I was very happy to discover this ability.

When the unit arrives, the outer packaging / outer box is as one would expect (usually, with packing tape sporting the logo "Elekon" on it). However: Once you get to the inner box - the one holding the Batlogger M2, and it's included cables, etc., then the uninitiated may begin to feel like Indiana Jones in The Temple of Doom...Searching for the hidden "switch" or pressure point which will magically allow the box to open - Granting the new owner access to this high-tech scepter.

More than one user of the new BatLogger M2 has experienced a bit of frustration, while trying to figure out exactly how this box opens...

Well, in hindsight...after experiencing what this bat detector can do, I feel that a box which has the potential to be a bit of a puzzle is quite fitting!

Here, we can think along the lines of The Sword in The Stone, and similar stories...

The formidable capability of this powerful new BatLogger cannot just be handed over to anyone. You must first pass a test, to prove you're worthy!

"With great power, comes great responsibility" - Uncle Ben, from Spider-Man.

The BatLogger M2 measures 220 x 70 x 46mm, and weighs only 222 grams. This is excellent, and it feels relatively light, and very comfortable in the hand. This is also partly due to the detector's ergonomic design. Very nice.

The M2 measures 220 x 70 x 46mm, and weighs only 222 grams. 

It feels lighter than it’s predecessor (The M) and is quite comfortable in the hand. This is due to the detector's ergonomic design.

Holding The M2 for long periods of time should present no issues, or cause fatigue for the majority of users: It features a unique shape, with an ergonomically designed handle. 

The M2 is robustly built, and even features a built-in attachment point for a (user-supplied) lanyard.

The BatLogger M2 - Using Halloween Theme

When considering the (unique) design of The BatLogger M2; I'd like to take this opportunity to point-out that: It's predecessor, The BatLogger M was also fairly comfortable to hold (due to it's hourglass shaped design). However, it is a heavy, solid unit.

Holding The M2 for long periods of time should present no issues, or cause fatigue for the majority of users: It features a unique shape, with an ergonomically designed handle.  

The M2 is robustly built, and even features a built-in attachment point for a (user-supplied) lanyard. 

As for features, there are numerous...

I found The BatLogger M2 very easy to use.

• The M2 uses a built-in, rechargeable, Li ion battery.

• It is currently priced at right around $1,200 USD, directly from Elekon’s Online Shop.

• It is also in stock at many Dealers throughout Europe (NHBS [in The British Isles], etc.)

• The M2 uses a MicroSD card as it’s storage medium - Be sure to get a fast/good quality SD card for best results.

• Front / User-facing Mic for recording comments

• USB-C connector (under rubber SD card cover)

• 3.5mm headphone jack

• Standard ¼” socket for tripod mounting

 

• USB charging cables are provided

• Live Recording Level Indicator

• Recording Modes: Auto / Manual / Paused / Interval Mode

• Live, adaptive Spectrogram Screen Display

• Auto ID! 32 European bat species

• Recent Recordings - displays Metadata for 20 recordings

• Transect Mode - Way-points dynamically displayed in different colours

• Sensors! Temp in ℃ / % r. H. / Lux / GNSS 

• Also height above sea level and velocity

• In/Out Counting feature for bat roost surveys

• Torch Mode

(My Apologies - Image was temporarily lost...

working on it)

An interesting consideration, is that The M2 is well-suited to meet the needs of many bat working professionals. In no small part, due to it's versatility...

Which translates into this BatLogger M2 being very good for:

• Bat Workers
• Ecologists
• Biologists
• Researchers

(My Apologies - Image was temporarily lost...

working on it)

BatLogger M2 - 'Almond' Coloured Theme - Sensor status displayed

The BatLogger M2 also possesses many additional features:

• Ability to add voice comments during a recording session.

• Ability to add a tag to a specific recording.

• Ability to view and/or playback recordings directly from the device.

Ability to change the way it sorts through recordings: Name ascending, Name descending - Date ascending, Date descending.

After an adequate amount of testing, it was easy to confirm the accuracy of not only the recordings, but the M2's valiant attempts to auto ID the species detected.

Now, of course, I reside in The U.S. and the unit currently only Auto ID's European bats. 

(My Apologies - Image was temporarily lost...

working on it)

BatLogger M2 - On windowsill - Passive recording (Green theme)

The BatLogger M2 can display the metadata of each recording such as: 

• The Trigger frequency.

• Temperature.

• Profile used (Explore, Passive, etc.).

• A graph with the spectrogram (spectrum data is averaged).

(Sorry - Image was temporarily lost...

working on it)

The M2 - Displaying detailed GPS satellite Info

Some of the other data, accessible directly from The M2 includes:

• The Log (Batrec.log file) - Displaying hardware/Mic events.

• Ability to create custom Recording Profiles (this may also be done via the desktop app).

• Ability to check/change sample rate (312.5kHz, 384kHz or 500kHz)

Pros:

• A feature-rich, Pro-level bat recorder, which will meet the needs of the most demanding Biologists.

• Ability to create several customization's - Via device, and/or via the free desktop app (BatExplorer).

• It is as sensitive, accurate, and as pleasurable to use as you might expect from a top-of-the-range bat detector.

• It’s simple enough to use straight out of the box - Yet has enough advanced features to keep a user busy for many days - Just learning how to use them all!

• The GPS/GNSS is extremely accurate, and the resulting .gpx files may be viewed with a myriad of Apps.

• With a user-replaceable microphone module, this detector has the potential to last many years.

Cons:

• It froze on me once. I had to plug it into my laptop’s USB port, in order to power it down.

• I occasionally find the BatExplorer software to be a little slow.

So, I'd like to share some information recently acquired (Oct. 2022) via e-mail correspondence with an acquaintance of mine, who is a Professional Bat Researcher. His name is Jon Whitehurst, IoW Bat Group Operations Officer - IoWbats.org

He is also a long-time user of The Batlogger M, in September, he wrote to ask what my thoughts were regarding the new Batlogger M2. 

I advised him that The M2's microphone, recording range, and rejection of non-bat sounds was superior to The M. Also, that The M2 has so many features, as to almost make The M seem quite plain (in comparison). And a couple of other things I like about it.

Having recently acquired the new M2, he's had opportunities to use both the M/M2 side-by-side in his work on The Isle of Wight.

I was granted permission to quote him, with the caveat that these are casual observations from some of the first outings, rather than scientific comparisons.

With that stated, I shall simply quote him directly:

"Hey Al, just got my first two surveys in with M2 and classic back to back. Performance wise, the M2 had better trigger reliability than the classic (M2 set to high and classic on crest triggering).

M2 is more sensitive and looks better signal to noise, and first glance better linear dynamic range.

M2 GPS not as accurate but OK... In transect mode, it was great to have track and position in front of me as the woodland track I was walking has a number of false paths and potential for getting lost.

However, I think there is a wrong sign in the code that sets the direction of the position arrow - one for me to feed back to Elekon. Also great to have Lux and RH data as well as temperature recorded.

It is a definite game changer - not had time to really delve into optimising the settings yet though..."

-And- 

"Definitely getting much better triggering though - recording bats (common pips) where the classic is missing them, but I need to swap the mic over on the classic, just in case it is the mic that is degrading..." 

I understand what is meant by his last statement. As with enough use and passage of time, The Batlogger M's microphone can begin to lose sensitivity. In some cases this happens gradually (almost imperceptible) and in some, quite rapidly.

Jon was also kind enough to share the following screenshots with me. The first one represents The Batlogger M. The second one, The Batlogger M2:

Red is Pip and Cyan is Bbar

M2

"The missed ones by the classic look to be weak calls on the M2 recordings, so might just be down to sensitivity/signal to noise rather than the trigger algorithm itself.

The GPS track shows you how long the M2 took to stabilise at the start compared to the classic... One to watch really as "GPS lock" does not necessarily OK to operate accurately.

By the way, the transect is a continuous walk at 2km/S, no stopping, both the recorders set to record 500mS pre and 2500 post trigger."

It's been quite some time since a bat detector has impressed me this much. The only other (Pro-level) bat detector which was this impressive, was The AnaBat WalkAbout from Titley. The WalkAbout was a bat recorder which ticked all the boxes.

Next up, will be a full review of The BatLogger S2 - Passive/Static bat recorder also from Elekon.

Until then...

Happy bat detecting!