Thursday, 14 May 2026

Parasitica photography

Parasitica Photography

I've been asked several times recently about how I take photographs of parasitic wasps, so here are the details of my current setup:
  • 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. 
Parasitica Photography


See: Cann, A. (2025) Fine Details: Tips for improving specimen photography. Br. J. Ent. Nat. Hist. 38: 199-206.
 



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.


New Arachnid Recording Schemes Atlas
A exemplar of how to make biological records available.  

A happy accident. 

I'm afraid so...

It's a specialist interest I have to admit, but what's the deal hymenopterists - why the reluctance to dissect?

Finessing focus stacking
I've been experimenting to see if I can improve the quality of microscope images I generate. The answer is - yes ... but ...


Notable Finds
Mesopolobus aequus, 1st record for VC55
Cryptoserphus dilatus, 1st record for VC55

News from Elsewhere

A new research paper looking at pesticide residues in bird feathers in Leicestershire and elsewhere finds that:
  • 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.

Torymus rubi