Random musings about the world of bats and bat-workers from a professional bat ecologist, based in Scotland. Equipment reviews, bat humour, opinion and anything else that occurs to me.
Tuesday, 27 January 2026
Taking bats into 'The Parallel Realm'
Thursday, 1 December 2022
A consultant ecologist's creed
When I began to consult as an ecologist
Said I to myself — said I
I'll work on a new and original twist
Said I to myself — said I
I'll never assume that a client with cash
Is a person with whom I never must clash
Because my new car is expensive and flash
Said I to myself — said I
Ere I survey at sunset I’ll always take care
Said I to myself — said I
Substandard equipment I never will bear
Said I to myself — said I
When a bat flutters past and I don’t know where from
I’ll not scribble notes with egregious aplomb
So that licensing work is certain to come
Said I to myself — said I
I won’t write reports that contort and confuse
Said I to myself — said I
Or use fifty words when just four I should choose
Said I to myself — said I
My recommendations shall be honest and true
Never used to assist my income to accrue
Even though my bank balance is making me blue
Said I to myself — said I
Though shag-nasty surveys may seem commonplace
Said I to myself — said I
I'd like to believe I've an honest face
Said I to myself — said I
I owe to myself and the bats my best work
Though the dodgier clients may offer me perks
That kind of behaviour’s the province of jerks
Said I to myself — said I
With profuse apologies to Gilbert and Sullivan, for
ripping off the Lord Chancellor’s song from “Iolanthe” and to all the
upstanding consultant ecologists who would never dream of such behaviour.
If Gilbert and Sullivan are new to you, they wrote a series of popular Victorian comic operettas which poked fun at the establishment, in this case the incredibly corrupt legal system of the 1800s (seriously – Victorian lawyers and judges made Boris Johnson look like an honest little angel). The Lord Chancellor's song
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Tuesday, 10 May 2022
The bane of bat surveys - that b***dy PIR flood-light!
I’m sitting here, very still.
Of bats I hope to get my fill.
But all ain’t well. It isn’t right:
That bloody PIR flood-light
Bolted there, upon the wall,
It’s glaring eye stares at all.
The owner promised it wouldn’t work.
Now it’s clear he’s a lying jerk.
If I move a tiny bit,
All around is brightly lit.
Bright as any supernova,
My survey will be truly over.
So here I sit and curse my lot,
Want to move, but I cannot.
Cramp in foot I cannot sate,
My itchy nose must also wait.
Frustration grows, no longer care,
Desperately around I stare.
I see my answer, my lips I lick,
As my eye falls onto a half-brick.
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Thursday, 5 May 2022
Intermediate bats and Nellie nights
I love this time of year: the start of the survey season kicks off; the team are fired up and ready to see some bats after so long; new seasonal field ecologists are excited to start their first bat survey season and at last we get to do the surveys which have been stacked up for months, waiting for the start of May.
Perhaps I'm especially enthusiastic, given that these days our team has grown to the point where I can pick and choose which surveys I want to lead and know that the others will be entirely under control, whether I'm there or not.
My first survey of this years season was a great site - a lovely converted farm building alongside a nature reserve. A previous survey of an adjacent building had noted that there was a Soprano pipistrelle maternity roost at the south-facing wall-head, so it was already promising.
Just as exciting was that the survey was a "Nellie night". Three shiny new field ecologists, having completed their theoretical and practical training were there for the final stage of their training, where they complete their first actual survey with one-to-one supervision and guidance from one of our experienced people. In the 21st century business world this would be called shadowing, but I rather like the old-fashioned name for it: "sitting next to Nellie". There's nothing quite like seeing the sheer pleasure an early career ecologist gets from putting their training into use for the first time and recording useful bat survey data.
I pointed out the bat droppings under the known maternity site, on the ground, sticking to the wall and on a window-ledge and gave the team a warning. The start of May is a fascinating period, when bat roosting activity is fluid and the greater clarity of roost use we tend to see in the summer hasn't started yet. Just because we know where the maternity site is doesn't mean that that is where the majority of the bats will emerge from - the maternity group probably won't have fully coalesced yet.
I do like it when bats do what I say they're likely to do - so often the gods of bat-work overhear me and take their vengence by ensuring something totally different happens. On this night however, the Sopranos behaved very nicely. In all 175 bats emerged from the building during the survey, 99 from the known maternity site and the remainder in groups of up to 13 from a dozen other roost locations around the building. Classic spring intermediate roosting - a great learning experience for the Nellie-nighters and it will be interesting for them to compare results later in the season with this survey.
There was another early season bonus too. As temperatures tend to drop fairly rapidly after sunset this early in the year, the foraging period is often short and the result of this was that some of the nellie-nighters were able to observe swarming behaviour, as some of the bats returned to the roosts before the end of the sunset survey.
All in all, a really nice survey, but for me the best bit came at the very end, as equipment was being packed away. I'm a strong believer in hiring clever, capable people and empowering them to get on with it, trusting them to make good decisions and telling them not to allow me to micro-manage them. Noticing the contents of one of the survey kits wasn't properly packed away yet I leaned over to deal with it, only to be headed off by one of our brilliant assistant ecologists, who already had the matter in hand. When the team feel sufficently confident to shoo the boss away, with a stern "get away", then I reckon we're getting things about right!
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Thursday, 14 April 2022
Freelance ecology - the money game
Sunday, 3 April 2022
What does the future hold for bat groups?
Like many licensed bat-workers, my journey commenced with membership of a local bat group. I was lucky enough to also get involved with a couple of research projects, which expanded my opportunities, but many of my earliest experiences with bats were gained by helping Lothians Bat Group with things like bat box checks, roost counts and hibernation surveys.
Bat groups have long been at the heart of bat conservation: local groups of like-minded people, coming together to devote time to monitoring and conserving bats, to encouraging the public to understand and care about them and of course, to training new bat-workers and giving them opportunities to work towards their own licenses.
Success for bat groups has always been a hit or miss affair. Like most voluntary groups, it all depends on having enough people who want to put in as well as to take out; on people with organisation and leadership skills and most of all, on people who can spare some of that precious commodity, time. Groups need committees of people, able to work together to arrange events, drive the group forward and inspire others to take part.
When I was first actively involved Lothians Bat Group had the benefit of Dr. Stuart Smith, who ran the group as a sort of benign dicatorship. Stuart was a great combination of encouraging mentor and organisational demon, so much so that everyone was happy with the status quo and things went swimmingly, until Stuart retired and moved away. Happily, the group is still active, unlike in some areas, where groups have folded. Like so many voluntary groups we have a committee of very busy people. We all have lots of other commitments: family, children, work etc and inevitably the bat group has to take it's turn. I suspect we all feel slightly guilty for not doing more, but there are only so many hours in the day.
Many of us who hold bat licenses also work in conservation and consultancy and, let's be honest, you have to be phenomenally keen to spend five days a week working with bats and still be willing to go out and do voluntary bat work. Many of us do it, but when I think back to how much more voluntary bat-work I did before I worked in the field it's quite thought-provoking.
In rural areas it is even harder, as human populations are more thinly spread and greater travel is necessary to meet. In one region I've been involved in, the same faces were committee members of the local amphibian and reptile group, bat group and badger group, further diluting the available time and effort available to each group. Good on them for keeping the flags flying though!
I have a sense that bat groups today are not as active as they were a decade or more ago (I hope I'm wrong) and that is very worrying. The Bat Conservation Trust are active in encouraging and supporting people to set up new groups and in running projects intended to raise awareness and encourage the creation and development of bat groups. Here in Scotland we have had a series of highly active Scottish Bat Officers, funded by NatureScot, who have done some superb work.
So what's the answer? Bat groups are essential to successful conservation. If we don't have gangs of enthusiastic bat-fanatics manning stalls at events, leading bat walks and helping roost owners and if we don't ensure that the next generation of these members are being inspired and trained, who will take up the slack? The SNCOs don't even have proper funding for their core roles. The NGOs never recovered financially from the last recession and we may be heading for another.
It seems to me that the only way forward is for everyone who cares about bats to do what they can, to contribute where they're able: even the smallest contribution of time and effort is nonetheless a contribution. Perhaps in this 21st century world, when our lives are increasingly time-squeezed, there needs to be bigger committees of people taking on smaller roles within a group?
Or perhaps someone in south-west England (where he now lives) could hunt down Stuart and clone him for us? Lots of him.
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Saturday, 19 March 2022
To hell with birdies, I want BATS!
I wonder where the birdies is?
Cancel that - I don’t care,
But when will bats take to the air?
I’ve had enough - I want some hot.
All this tweeting is quite nice,
But I’ll ignore it in a trice.
It’s chips and chops I really like,
Hollow claps, clicks and suchlike.
My detectors polished til it gleams,
Batteries are charged, ready it seems.
‘Tis patience I am really short of,
I need some bats, to adore and love.
So, don’t keep me waiting, little bat,
‘Tis time to make your belly fat.
I’ll wait no more, I can’t, I vow,
So shift your butt and fly right now.
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Tuesday, 8 March 2022
Driving to bat surveys - don't risk becoming a killer
On 28 February 2001 Gary Hart was driving in the dark on the M62 motorway when he lost control of his vehicle. Later investigations revealed he was sleep-deprived and failed to apply the brakes. The car and it's trailer careered down the embankment onto the East Coast main railway line, where it was struck by an InterCity 225 train. Ten people died in the ensuing carnage and 82 were seriously injured.
Every year I hear stories from people who work in those consultancies (you know the ones I mean). They describe doing back to back sunset and dawn bat surveys, day after day, often with long journeys between and I can't help thinking of Gary Hart. He was sentenced to jail for five years, but I suspect a much bigger punishment for him was the knowledge of ten lives lost and 82 more whose lives were changed forever.
Selby was clearly exacerbated by circumstances, but imagine a head-on collision at 60mph. With a closing speed of 120mph it's entirely possible that you, your passengers and the family of five in the other car would all die or suffer life-changing injuries. And it would only take a moment's inattention.
With the new survey season approaching I thought it might be time to share a few thoughts on ways to limit the risks associated with driving to and from bat surveys at night, so here are my top ten suggestions.
1. Get to know what your level of tolerance is for fatigue and stay well inside it. How will you recognise when your abilities are impaired? You need to know. Be aware that your tolerance for fatigue decreases with age - I'm 56 and I can see a noticeable difference between now and a decade ago.
2. Heroes are those who save lives by being sensible. Pushing yourself beyond your limits to get that one last piece of survey work completed doesn't make you a hero - it definitely makes you the other thing.
3. Plan your workload and your sleep patterns. Within our team we avoid back to back sunset/dawn surveys like the plague and our full-timers are encouraged to take time off during the day to rest and ensure they are fresh when they need to be.
4. If you're under pressure to go beyond sensible limits you need to think carefully about what your options are, but you must address the issue. Dont fall into the trap of thinking it'll be fine, because one day it won't.
5. Do everything you can to keep your mind active whilst driving. I use talking books from Audible to help me stay alert - listening and thinking about what I'm hearing keep my brain fully functional. Music may help some people, but I worry that rhythmic sounds may be counter-productive.
6. If you have passengers in the car, get them to help. The best person ever for this (she knows who she is) was a member of our team who could sit in the front passenger seat and talk continuously and animatedly for two hours about her pet ferrets, horse-riding, pole-dancing, her various part-time jobs and heaven knows what else - it was impossible to doze off with that going on!
7. I hope your car's fully serviced. with good tyres etc, but there are things you can do to reduce your workload. Make sure your windscreen is clean - bugs, smears etc are much more obvious in the headlights and peering through a murky wind-screen is not going to help you.
8. Are your headlights clean? It is gob-smacking how much less effective they are with even a thin layer of traffic film. I use my headlight washers at least once every journey. If your car doesn't have washers then carry a wet cloth in a bag and wipe them before setting off in the dark. The more forward illumination you have the easier it is to focus on driving safely.
9. You're in a hurry to get home - aren't we all, when it's 2am and a warm bed is calling? You know what I'm going to say - drive to the road conditions and resist that massive temptation to put your foot to the floor, especially on winding country roads.
10. If you recognise that you're fatigued, whatever you do, don't press on regardless. I find power naps suprisingly effective. Recline your seat and set an alarm for 20 minutes (no more than that or you risk going into a deep sleep and waking up more tired than you started). Close your eyes and empty your mind. If that doesn't work then it's time to accept that you've got it wrong and either dig out the sleeping bag or find the nearest Travelodge.
Please don't think this is a definitive guide - I'm not a sleep expert or an advanced driving instructor. But we work in an industry that tends to overlook this issue or worse, treat it as a macho thing. And that's just plain stupid.
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Wednesday, 5 January 2022
Getting into ecology - guest blog
Izzy McQuillan is a graduate ecologist at WSP, with a knack for communication. She recently condensed her experiences of gaining her first steps onto the ladder of professional ecology into a series of LinkedIn posts. They are solid gold advice for anyone looking to follow in her footsteps and Izzy has kindly combined them into a guest blog for David's Bat Blog.
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So this time last year, I saw my job role advertised on Linkedin and decided to take the plunge and apply.
I thought it would be useful to target some posts at current students, recent graduates and anyone trying to 'break' into ecology. There are a few useful tips that I wish I had known in my final year, or during my job search.

How much have you thought about your CV before popping it at the end of your application...
Following the application, where you have to fill in several boxes on 'How you align with the company ethics' and 'What skills do you have that make you suitable for this role', often you can overlook your CV and cover letter, when it fact, it could be the reason you are being overlooked yourself.
Some companies filter through job applications just looking at the cover letter, if you just have a few lines, your job application is going to get rejected.
So, some tips for your application from someone who has applied for lots and lots of jobs...
⭐Have you recently left university? Make use of their careers service, I went to the University of Manchester and we had 2 years post graduation to make use of the service. Get your CV checked, have a mock interview, speak to them about potential companies you should target.
⭐ Tailor your application. Make sure your CV is relevant to the job you are applying for, look at the words used in the advert and translocate these into your CV. Answer the points in the advert 'Must show excellent team-working skills'- use STAR (Situation, Task, Action, Response) and show HOW you have developed these skills. Problems I have seen with some graduate CVs is that they have one line about their degree. You've spent years, and thousands of pounds on your degree, make it work! Use bullet points and make everything cohesive, clear and accessible.
⭐The cover letter. What have you put in it? I was following the University career services guide on what to put in my cover letter, and it was actually causing me issues applying for ecology roles!
The format I previously followed was Paragraph 1- Where I had found the job, 2- What I know about the company and why I am suitable to work with the company, 3-Why I was suitable for the role. Then I changed my cover letter and I got an interview for my current role. As survey skills are so important in ecology, if your cover letter is missing these points, you won't be selected. In your opening paragraph, mention the experience I have mentioned previously is so important. Bullet point these skills. For example:
'Thank you in advance for taking the time to read my application. I have found XXX role advertised XXX. I am extremely keen to secure my first ecology role, as such I have recently developed skills in:
🦇Bat call sound analysis, using Kaleidoscope.
🗺️GIS skills, including the production of red line boundaries and Phase 1 maps on QGIS.
🌱Botanical skills, including identification of common hedge species such as Hawthorne, blackthorn and woodland indicator species such as Lords-and-ladies.
(All the above are free skills you can develop over the winter in order to be prepared for the upcoming ecological season)
So you're on Linkedin, you've found a role and company you want to work for and you've tailored your CV, now what?
How do you ensure you apply and can secure an interview?
Applying for roles can honestly feel like a job in itself. Each application can take hours; ensure you shift through the roles appropriately and allocate a few hours for the initial application. With consultancy, you will also likely have a skills based test post-interview which is still a part of your application.
Prior to my first graduate consultancy role, I was asked to produce a desk study of a site. Be prepared for this additional assessment when you put in your application. I was given a week to produce this report. During this week I was working full-time and it was also my birthday so I had to allocate time appropriately in order to ensure I didn't miss this role with a poor application. I visited the site in question, conducting a site walkover in addition to the desk study, this strengthened my report and impressed my future bosses. I secured the role.
During my ecology interview, I had a species test. I would say this is quite common within ecology. As a seasonal this should be common species you might see out on site (tracks or species images). Be prepared for this, have a research on Linkedin seeing what your potential future colleagues might share around species, you might be pointed in the right direction on what they might test you on.
And my last piece of advice?
Be yourself!
Remain professional but don't hide parts of your personality in order to 'fit in'.
If you are pretending to be someone you are not in order to secure this role, you will not feel comfortable at work. If you get rejected for being yourself, it isn't the end of the world. You are one step closer to finding a team that is perfect for you!
Don't be dis-heartened, I applied for so many roles over the years. I'd come close, had interviews but never got past that stage until 2020. Hopefully, these ideas help you.
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Thursday, 16 December 2021
A new invasive species invading homes at Xmas
It's winter, when professional ecologists use the down-time to refresh and update our knowledge. This Christmas a new and invidious invasive species is invading our homes and spreading rapidly, so here I present an important guide to the ecology of this worrying species. I am of course speaking about the Lindt chocolate teddy-bear.
This dangerous invasive is native to the Zurich area of Switzerland, but, like Chinese mitten crabs, skunk cabbage and white-clawed crayfish, human actions have brought them to this country and they are spreading rapidly...dangerously so.
It has been said that we are never more than 6 feet away from a rat. Whilst this is an urban myth, it is possible that Lindt chcololate teddy populations may be growing to the point where it may be true of them. Every day my wife Rona has to spend time searching the house, removing many teddies from their hiding places around the house. Individually they may be cute, but in large numbers their thousand-yard stare becomes alarming and threatening, especially as nobody knows exactly what they are plotting.
What is particularly worrying is the large gaps in our understanding of chocolate teddy ecology. For example, we know little about their diet and where they gain the resources required to support their unusually rapid reproduction. However, there have been sightings of packs of teddies slaying Lindt chocolate reindeer and feasting on them.
The social structure of a teddy colony is complex and unusual, with possible parallels to ant or wasp colonies. As well as being found as individuals, teddies are sometimes found in groups.
There have been very occasional sightings of large accumulations of teddies engaging in mass communication of some kind, with giant queen teddies at the centre of the colony. It is believed that these mass meetings lead to mass dispersal, with teddies hiding around the house, watching and waiting for something.
It's easy to dismiss Lindt chocolate teddy-bears as being a seasonal and harmless invasive species and particularly tasty and it is true to say that their main predator is my chocaholic wife Rona. However they do seem to breed very rapidly at this time of year and social media does indicate signficiant prublic concern about them.
Saturday, 4 December 2021
Early career ecologists - making progress in winter
Winter, hibernation season for ecologists? Not quite, but it's definitely the time to slow down, write reports, catch up on admin. and take back some of those extra hours we all work during the summer. But what if you're an early career ecologist, who either doesn't have a full-time job yet or whose seasonal role has now ended. How best can you best fill the winter months? Hopefully you've managed to earn enough in the summer to keep you going, but how best to prepare yourself for the next season?
I suspect you'll be spending an inordinate amount of time hunting the job sites, sending out CVs, crafting cover letters (a truly satanic task, if ever there was one) and praying that you'll get the job you know you deserve. Whoah! Stop that negative thought NOW - you DO deserve it. Winter is also peak the peak season for depression.
Earlier in the year I posted some suggestions for ways to enhance your field skills and improve you chances in the job market (Field skills for early career ecologists and Early career ecologists and hamster-powered scootering). So what can you do to enhance your employability when the weather is wet and grubby and all the interesting wildlife is hibernating (I'm a bat specialist, so that may be a slightly biased view)?
Here's a thought - how are your bryophyte ID skills? Many moons ago I recall standing, huddled together in the rain with a group of fellow-sufferers whilst Nick Hodgetts bounded enthusiastically around an embankment, showing us different bryophyte species (Nick's a brilliant tutor by the way, and I can recommend the courses he leads). The fact is that bryophytes are often at their best when wet and some species are especially useful for habitat indication. I wrote a post about a few commoner bryophytes a few years back (Right-diddly-wotsit-squirrelly) Since then the British Bryological Society have completed their superlative field guide and I'm happy to say it's very user-friendly and a great addition to your christmas list.
A former member of my survey team got his first break into what has subsequently been a successful career in professional ecology, when he turned up to an interview and was handed a bag full of plant material and asked what he could ID from it. The first thing he noticed was Polytrichum commune - a large and striking moorland moss which, as luck would have it, I'd pointed out to him during an especially boring transect the evening before. Lucky or what? So don't neglect bryophytes! They have a charm all their own.
If you're a member of your local bat group now is the time to start asking about hibernation surveys. Be persistent and make sure they know how keen you are, because for many underground sites numbers need to be limited, to minimise disturbance. Data from these surveys feeds into the critically important National bat monitoring programme and, after having to shelve surveys last winter due to Covid it's really important to gather data this winter (though there's a new risk assessment process). You do, of course, need to accompany someone with an appropriate bat license and not just for legal reasons - underground sites are dangerous. There's more about bat hibernation surveys here: The great hibernaculum hunt and here: The great hibernaculum hunt revisited.
How are your GIS skills? When the weather is miserable, why not delve into QGIS, the free open-access GIS system which has become ever more popular over the past few years? GIS is a core skill for a lot of ecology work and if you're new to QGIS there are many free resources to help you work your way into QGIS. Take a look at The QGIS project.
Finally, winter weather isn't all bad news and there is nothing like freshly fallen snow for finding and identifying animal tracks - another very useful field skill. There are quite a few guides available, but my favourite is Preben Bang and Preben Dahlstrom's book, which has been in print since forever - I remember borrowing an early edition from the library when I was a teenager in the 1970s (the late 1970s, just to be clear!). Don't be put off by the Ray Mears celebrity gimmick on the current edition, it's a really good field guide and well worth hinting to Santa about.
Tuesday, 9 November 2021
Ode to a bat-hater
You seem to confuse them with rats,
Or birds or possibly cats.
Your thoughts on the matter,
Are mad as a hatter,
If unsure, why didn’t you ask?
Bats will get caught in your hair?
To the bat that’s really not fair,
And factually lacking in care.
Your fixed prejudice,
Is a load of old pish,
Though your truth-twisting’s done with real flair.
You firmly believe a bat ought,
For sucking of blood to be shot,
Or otherwise nastily caught.
Never forget,
The thing it just ‘et,
Was a midge and not you, you clot
Your hatred of bats I hear,
Is drip-fed by the press in your ear,
And based on irrational fear.
If only you’d see,
They’re actually twee,
The world would be better, that’s clear.























