The night of 25th-26th June was one of the best for moths for many years, it was ideal, warm and calm. Moths fly for longer on warm nights, unlike day flying insects they cannot use the sun to warm up for flight, so are dependent upon the air temperature being high enough. This is why, on most nights the main flight will be at dusk and numbers decrease through until dawn.
I knew it would be good from the forecast and from the fact that sleep was difficult, one advantage of this was that I was awake at dawn so could go and close the trap before the birds could clear any moths that had not got inside. In my garden I run a small, low power actinic moth trap, the light is less bright and doe snot disturb neighbours, the lower light output means it catches fewer moths. I could see immediately that it was full of moths, the eventual tally was a remarkable 79 identified species, with one or two more unidentified.
Meanwhile at Blashford I had put out two traps in slightly different habitats, if my small trap had that many species how many would there be in the bigger traps? The answer turned out to be about the same, one around 75 species and the other just over 80. I suspect that some of the micro moths, which make up a lot of the catch on calm nights, get out of the trap if it is not covered and taken in soon after dawn.
Many of the micro moths are stunning to look at, if you can see them well enough! This is where macro photography and especially digital photography comes in so handy, the images can be enlarged on the screen.
My home trap did yield one new species for the garden and not a micro moth either, it was a red-necked footman. These are curious moths, I will not see any for ages and then suddenly see a whole swarm of them, perhaps 100 or more flying together around a tree top in bright sunshine.
A number of the micro moths have similar patterns, even if they are not closely related, one recurrent pattern is white with dots, this is a common pattern in the Yponomeutidae, but then crops up again int he distantly related thistle ermine, which is a Pyralid and of course in the white ermine itself, which is one of the tiger moths.
Not everything that gets attracted into a moth trap is a moth, other night-flying insects also arrive. I was very interested to catch a fine beetle that I had not seen before and which I did not remember seeing illustrated.
When I first tried to identify it, thumbing through some general beetle books, I did eventually found it, the text said “rare in Britain”. Having identified it, at least tentatively, I looked it up on the web and found a rather more contemporary account of its status. I confirmed it was indeed Diaperis boleti, one of the darkling beetles that feed on bracket fungi, it used to be rare, but now it seems it has “become quite widespread and is locally frequent”. It is probably another species that is benefiting from a warmer climate, a reminder that there are winners and losers when things change.
At Blashford the micro moth theme continued, but with a mostly different caste, a few of which are below.
Out on the reserve the breeding season progresses, the common tern chicks are growing fast and a good few of the black-headed gull have fledged.