- Specimens: preserved in 70% alcohol, suspended in clear alcohol hand gel in a small transparent lid covered with a coverslip.
- Microscope: Brunel SP300 compound trinocular microscope, using 2.5X, 4X, 10X or 20X objectives as appropriate.
- Camera: Sony a7Rii.
- Lighting: Dual gooseneck LED plus two Ikea Jansjö LED lamps, diffused by a cylinder of white kitchen towel.
- Post-processing: Focus stacked with Helicon Focus, processed with Canva Affinity.
Thursday, 14 May 2026
Parasitica photography
Friday, 1 May 2026
Entomology Update - April 2026
Spring is here but with night time frosts and the now common spring drought which will shape the rest of the year.
I've been experimenting to see if I can improve the quality of microscope images I generate. The answer is - yes ... but ...
News from Elsewhere
- Every single feather sample tested contained measurable levels of pesticides.
- On average, samples contained more than 5 different pesticides.
- Despite being banned for outdoor agricultural use in 2018, neonicotinoids were frequently detected.
Thursday, 16 April 2026
Finessing focus stacking
I've been experimenting to see if I can improve the quality of microscope images I generate. The answer is - yes I can, but is it worth it?
DxO recently released their DxO PureRAW 6 image processing software. There are lots of reviews on YouTube if you'd like to know more. I downloaded a free trial copy and compared three different focus stacking variations. I'm not the first person to do this, just documenting it here in case it's useful to you:
- Capture jpeg images in camera, focus stack with Helicon Focus, post-process with Affinity Photo. This is the standard method I have used until now.
- Capture raw (.ARW) images in camera, focus stack with Helicon Focus, post-process with Affinity Photo. Helicon will stack raw image files, so I tested this.
- Capture raw (.ARW) images in camera, process with DxO PureRAW 6, focus stack with Helicon Focus, post-process with Affinity Photo.
The results:
At this level, no real difference, and I need to pixel peep at 100% magnification to see the differences:
- To make a focus stack using ~40 jpeg images typically takes me something like 15 minutes (sample processing, image capture, focus stacking, post processing).
- Using raw images, Helicon stacking increases from 10 seconds to 240 seconds, the whole process taking ~20 minutes.
- Processing with the sparkly new DxO DeepPRIME XD3 algorithm before stacking takes about 10 minutes, the whole process then taking ~30min. Although Helicon can output a raw (.DNG) image, DxO will only accept original images so it is necessary to batch process captured images before stacking rather than process a single stacked image. The more images, the longer it takes - I estimate making a stack with 100 images would take over an hour from start to finish. This isn't necessarily hands-on time, DxO will happily batch process in the background while I do something else, e.g. prepare the next specimen and capture the images. Sadly it's not possible to process the DNG file Helicon can put out - DxO processing really has to be the first stage of the workflow after image capture.
There is an improvement in resolution dropping DxO into the workflow at the cost of much longer processing time. Leaving aside the cost of the DxO software, is it worth it? Not for routine images where I'm just documenting an ID. But on occasion, yes, maybe the extra quality is useful.
Tuesday, 14 April 2026
Teeny-tiny wasp willies
I recently encountered Torymus rubi for the first time. It was on the host plant (Rubus) and with some help, I was able to get a definitive ID. Not all species in the Torymidae are so straightforward however. This brought up again the question of why hymenopterists seem so reluctant to use gen det to confirm difficult species. One paper describes Torymus male genitalia (Klymenko, S. (2012) Morphological Characteristics of Male Genitalia in Some Species in the Genus Torymus. Zoodiversity, 46(2), e-41). I have to admit, some are rather similar, and this paper only covers a few species. Fortunately, the T. rubi aedeagus is quite distinctive:
Sunday, 12 April 2026
He's only gone and bought *another* camera
In the year since I've had my Olympus OM5 camera I've become increasingly impressed with it. It's smaller and lighter than my previous Sony setup and the results are great. I was so impressed that I invested in the OM 90mm macro lens, selling the 60mm lens I originally bought with the OM5. I've developed a workflow for focus stacking which produces results I'm delighted with. However, there is one problem. As my system (and the quality of the results) has grown, so has the weight. The (absolutely brilliant) Cygnustech flying nun diffuser does the business, but it is cumbersome and a bit fragile, and I'm not keen on bashing the expensive 90mm lens around in the field. So I took the plunge and have invested in two complementary systems.
Studio macro setup:
- OM System OM-1
- OM System M.Zuiko Digital ED 90mm f3.5 Macro IS PRO lens
- +/- Olympus M.Zuiko 1.4x Teleconverter MC-14
- +/- Raynox DCR-250/DCR150
- Godox V860IIIO flash
- Cygnustech flying nun diffuser
Fantastic, but here's the problem - this setup is a bit fragile, and weighs 1,830g. I don't want to drag that around with me outdoors, so...
- OM System OM-5
- Olympus M. Zuiko 60 mm f/2.8 MSC ED Macro lens
- Olympus FL-LM3 Flash
- bit of packaging foam for a diffuser
And if even the OM5 is too much, I'll still be using my Olympus TG-6 for record shots and my iPhone (for landscapes). As ever, all this kit was bought used from trusted resellers (and guaranteed). Was the step up to the OM1 worth it? I'm still dialling in optimum settings and getting used to the camera, but first indications are favourable - focus stacks seem to be a step up from the OM5.
Saturday, 11 April 2026
Platycheirus ambiguus
Thursday, 9 April 2026
New Arachnid Recording Schemes Atlas
The British Arachnological Society recording schemes atlas has had a long awaited revamp and is now available, with 1.6 million UK Spider, Harvestmen and Pseudoscorpion records to play with. The new atlas is fantastic, with many ways to slice and dice the data. It's taken a huge amount of work to get to this and the team behind it are to be congratulated. It would be fantastic if all recording schemes could make their data available like this.
Tuesday, 7 April 2026
A troublesome wasp
Update: it's Mesopolobus aequus - got there on the 4th attempt!
- Prepectus extremely small, hardly or not detectable.
- Lower face with additional vertical groove parallel to genal groove.
- Antennal formula of female 11173 (male 11172).
- Tarsi of female heteromerous, fore and hind tarsi five, mid tarsi four-segmented; first segment of mid tarsi in female very long.
- Both mandibles with three teeth.
Wednesday, 1 April 2026
Entomology Update - March 2026
Some warm spring days but plenty of frosts - a varied month with the season moving on.
Notable Finds
News from Elsewhere
We all know it's been wet, but how wet exactly?A new paper shows that Steatoda nobilis and Zygiella x-notata typically made up more than 80% of the urban spiders in an Irish survey.
Thursday, 26 March 2026
Apolygus - simplified
Sunday, 22 March 2026
Swamped with Spangles
Saturday, 14 March 2026
Urban Spiders
A new paper shows that Steatoda nobilis and Zygiella x-notata typically made up more than 80% of the urban spiders in an Irish survey.
Collier, B. L., Leonard, D., Lyons, K., Dunbar, J. P., Lawton, C., & Dugon, M. M. (2026). Survey of Synanthropic Spiders in Ireland Reveals Expansion and Dominance of the Invasive Noble False Widow Steatoda nobilis in Urban Habitats (Araneae: Theridiidae). Ecology and Evolution, 16(3), e73193.
https://doi.org/10.1002/ece3.73193
Friday, 13 March 2026
Leicestershire entomology reaches the end of (another) era
Yesterday was a sad day for me personally, but from a wider perspective...
After 38 years, Leicestershire and Rutland Entomological Society (LRES) has scaled back operations due to falling participation and an elderly demographic. It's not completely gone, and the intention is that arrangements will be made for publications to continue (the plan is that the Natural History Section of the Leicester Lit & Phil Society will pick up the remaining activity of LRES, notably publications), but there won't be any more dedicated entomology meetings. We're not, of course, the first or the only society this has happened to.
A VC55 entomology society has blinked into and out of existence and number of times, first as an offshoot of the Zoology Section of Leicester Literary and Philosophical Society. In the second half of the 19th century Leicester was an entomological powerhouse. Before a dedicated society existed, entomology in the region was driven by the "Lit & Phil", founded in 1835. Perhaps the most famous name associated with this is Henry Walter Bates, the Leicester lad and explorer who discovered "Batesian mimicry." In the momentous year 1844–1845, a young Alfred Russel Wallace moved to Leicester to take up a position as a master at the Collegiate School, teaching drafting, surveying, and English. While he was already interested in nature, he hadn't yet found his specific calling. Everything changed in Leicester. Here, Wallace met Bates, a local man who worked in his family’s hosiery business but spent every spare second obsessed with entomology, spending his limited free time collecting beetles in Bradgate Park and Charnwood Forest. Their friendship quickly turned into a professional partnership. By 1847, Wallace was bored with teaching and proposed a radical plan: they should travel to the Amazon rainforest to collect specimens and sell them to museums and collectors back in London. They left for Pará (now Belém), Brazil, in 1848. While they eventually split up to cover more ground, their time in Leicester remained the foundation of their careers. Frederick Bates, younger brother of Henry Walter Bates, began publishing in the Transactions of the Leicester Literary and Philosophical Society from the 1850s. In the late 19th century, figures like William Armston Vice and Frank Bouskell pushed for a specialized entomological section. For a time, a "Leicester Entomological Club" operated within the Lit & Phil, eventually evolving into Section F (Entomology) by the 1880s, producing the first comprehensive local checklists for the Victoria County History (1907). The Entomology Section ceased to operate during the 1939-45 World War and was not restarted after the War.
The Great Hiatus and the 1988 Rebirth
Following the 1939-45 World War, there was no formal entomology society. Naturalists of all shades typically met at the Leicester Museum, which acted as a de facto hub. Notable Leicestershire entomologists tended to interact directly with national entomology organizations. The modern society was born from a desire for a more focused, member-driven group when on June 8th 1988, a meeting was held at the University of Leicester to discuss forming a society. On September 5, 1988, the Leicestershire Entomological Society (LES) held its first official meeting at the New Walk Museum. A small number of founder members still remain. The society has always covered Watsonian Vice-County 55 (VC55), which encompasses both Leicestershire and Rutland. To formally recognize this, the society officially rebranded as the Leicestershire & Rutland Entomological Society (LRES) in 2022.
And now, it's over again - for now. Perhaps the "Leicestershire Entomological Club" will naturally re-emerge. Whether we blame Covid, social media, or Margaret "there is no such thing as society" Thatcher, I'm not happy this has happened on my watch, but the cyclic nature of Leicestershire entomology allows me to take comfort in the philosophy of Heraclitus -
No man ever steps in the same river twice, for it's not the same river and he's not the same man.
Sunday, 1 March 2026
Entomology Update - February 2026
February was a varied month, spring-like at times but mostly wet. I didn't get out much but made some interesting finds when I did.
News from Elsewhere
Wednesday, 18 February 2026
Card Protector Sleeves
Transparent card protector sleeves (widely available online) are useful for harmlessly restraining insects for photography, including under the microscope. They're a little too shiny to be perfect so you need to arrange the lighting to avoid surface reflection. They are earier toi use in the field than the alternative - floating frames.
Tuesday, 10 February 2026
TG Camera News
The PetaPixel website reports that OM System has launched a new version of the TG-7 Kit made for microscopes. The TG-7 Industry is a slightly modified TG-7 but the NY-TGV Super Adapter Kit is of most interest. I can't see any reason why this couldn't be used with any TG5, 6 or 7 camera.
I don't think this is the best or most cost-effective solution for a microscope camera, but if you already have the TG5, 6 or 7 the adapter kit might be worth checking.
The kit will be available in a few months time, UK pricing not available yet, but it is aimed at industrial users (who clearly have deep pockets).
Friday, 6 February 2026
Culture Wars - Scientists versus Citizens
I try and stay well away from culture wars, but it recently came to my attention that there is some new terminology I should be aware of:
Citizen Science - typically top-down. Usually initiated and managed by professional scientists or by institutions. To collect large amounts of data labour is "crowdsourced" to the public.
Community Science - typically bottom-up. Usually initiated by a group of people who have a specific concern about their environment. The community are co-creators and owners of the research and frame the question(s), design the study(ies), and interpret the results.
Rule of thumb: If a project asks you to "help us help science," it’s likely citizen science. If it asks "how can science help us?" it’s likely community science.
Sunday, 1 February 2026
Entomology Update - January 2026
After a freezing start, January was mostly ... wet, limiting entomology opportunities.
Events
News from Elsewhere
Friday, 30 January 2026
Oligometry
In Peritrechus, the structure of the antennae is an important diagnostic character. In Peritrechus geniculatus, ant3 is as thick or thicker than ant1, whereas in the other very similar species it is thinner. This recent specimen was missing the left ant4 but still identifiable as P. geniculatus. Then Jim Flanagan pointed out something odd to me. Maybe the left ant4 never got lost - it just didn't grow? The key is that the left ant2 is longer than the right - this is called oligometry and is frequent in Lygaeidae. Oligometry usually results in one of the antennae having three segments (it can also affect both antennae and then it is known as bilateral oligometry). It is thought to be caused during late development phase but precise reasons behind this deformation are not well known.
Tuesday, 27 January 2026
The Mysteries of the Metapleuron
- The ostiole: an opening on the metapleuron through which the MTG reservoir empties its contents.
- The peritreme: a specialized cuticular structure (often shaped like an auricle or spout) that surrounds the ostiole. This directs the liquid secretion away from the body and onto the evaporatorium.
- The evaporatorium (or matt area): a distinct, non-glossy region of the metapleuron characterized by a highly micro-sculptured, "mushroom-like" or reticulated cuticle which increases the surface area significantly, allowing the defensive fluid to spread rapidly and evaporate (volatilize) almost instantly. This creates a "scent cloud" that deters predators before they can make physical contact.
Saturday, 17 January 2026
An odd spot
I made my first ladybird records of the year yesterday. Since December, through all the rain, frost and snow of January, through Storm Gorblimey, these two 7 Spot Ladybirds, Coccinella septempunctata, (which had a good year), had been huddled up on a Yew planted a few years ago precisely to give overwintering shelter for invertebrates. But rather than seeking shelter they were clamped to the tip of a branch in the most exposed spot possible. I was starting to wonder if they were alive, or semi-alive (parasitised), but when I took their photo (without touching or disturbing them as far as possible), they wandered off in a huff and settled down again a few inches away.
Phone-based retirement
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| The Atlantic |
I don't write about sociology but I am interested in the collapse of social capital, especially as it relates to engagement with natural history. In the US there has been a lot of discussion recently about "phone-based retirement" - retired people are spending more time on (mobile) screens, with less engagement in traditional activities (such as stitting in chilly church halls listening to natural history talks). In his book Bowling Alone, sociologist Robert Putnam used the collapse of US 10 pin bowling leagues to illustrate the decline of social capital. While Putnam was describing a pre-Internet society, the same trends have continued and probably accelerated (Covid or no Covid). Putnam says he doesn't know the "answer" to this. Which is good, because neither do I. Currently it's hard to see how this trend could be reversed. For a mere £9 a year I can "participate" in all of Cambridge Natural History Society's talks online via Zoom. That, together with the super output of the Biological Recording Company, is in some ways an amazing prospect; and in others, thoroughly depressing.

























