Tag Archives: British moths

A female Vapourer

18 Tuesday Nov 2025

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The highlight of my walk last Saturday was finding my first female Vapourer moth (Orgyia antiqua), sitting on her cocoon, presumably newly emerged.

Now, you might look at her and think ‘That doesn’t look like a moth. Where are the wings?’ That’s the amazing thing about a female Vapourer – she’s almost wingless; her wings are so tiny that she’s unable to fly. Once she hatches, the female sits on her cocoon, as this one was, emitting pheromones and waiting for a male to fly by, notice and mate with her. Then, she’ll lay her eggs on the outside of her empty cocoon (as you can see on the other cocoon I found very close to the female, and which I also blogged about earlier this year: Vapourer pupa and eggs, January 2025). As she can’t fly, the female can’t feed, so she will die soon after laying her eggs.

Ominously, there were tiny parasitic wasps hanging around the female, presumably waiting to inject her eggs, so some of those eggs may not produce caterpillars come the spring.

Parasite of Bedellia somnulentella

27 Monday Oct 2025

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The two Field bindweed leaves I brought home from my coastal walk nearly two weeks ago, on the 14th, are the leaves that just keep on giving. As well as the three moth pupae I found on them – the reason I brought them home in the first place (see my blog Bedellia somnulentella revisited, 20 October), there was another pupa that looked to me to be that of a wasp, probably one that had parasitised another B. somnulentella larva.

That tiny wasp has now hatched. As is often the case with these miniscule creatures, I have no way of determining which exact species of parasitic wasp it is, and I do realise that the whole concept of a wasp larva eating a moth larva from the inside while it’s still alive is a bit gory (perhaps I should’ve posted this on Halloween!), but I find it fascinating, both the process of parasitism and also bringing the occasional things home to see what emerges. The little wasp, a male, has been released to live its best life.

Bedellia somnulentella revisited

20 Monday Oct 2025

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Back in September, in my blog Leafmines: Bedellia somnulentella, I covered the mines of a moth whose larvae have some unusual habits, spinning hammocks outside their mines to rest and pupate in. Now that I’m aware of them, I’ve been seeing these mines almost everywhere I see Field bindweed. And, during last Tuesday’s walk, when I saw the plant and turned over a few leaves, I spotted two leaves that had a total of three pupae suspended beneath. I decided to bring them home so that I could, hopefully, see what the adult moth looked like.

In the intervening six days, another larva has pupated – I hadn’t even realised there was another larva in the leaves but, on Thursday, as the leaves began to dry and shrivel, it appeared, climbed up the side of the jar, spun a hammock under the lid, and pupated.

Then, yesterday, when the wild, wet, windy weather meant I spent a day at home – a rarity for me, two of the adult moths hatched from their pupae. I couldn’t get any decent images through the glass so decided to risk opening the jar to grab a few quick photos.

And today I released them into the wild. All going well, there should be two more moths to come.

Leafmines: Chrysoesthia sexgutella

06 Monday Oct 2025

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Last Wednesday evening I got a message from local moth expert George that another local moth-er had found the leafmines of the moth Chrysoesthia drurella, a new find for the county of Glamorgan, in a suburb on the opposite side of Cardiff to where I live. As he knows I’m a keen seeker of leafmines, George just wanted to let me know to keep an eye out for them when I’m out walking.

The moth larvae mine the leaves of Orache (Atriplex sp.) and Goosefoot (Chenopodium sp.), neither of which plants I’m familiar with so that was my first hurdle, being able to recognise the plants and knowing where to find them. Out came my plant books! Sometime later I was fairly confident I’d recognise the plants, though not be able to distinguish one from the other; fortunately, in this case that didn’t matter.

Thursday dawned and, after dealing with some necessary chores, I headed out for a walk, deciding to detour to a local beach in the hope of finding the correct plants. I was in luck, and the plants had mines on their leaves, though they didn’t look like how they should for the moth larvae I was seeking. So, finding a mine that still had a larva in it, I plucked it off the plant and brought it home to take a closer look at it, as the larva’s markings would tell me one way or the other whether I’d found C. drurella. I hadn’t!

However, I had found a closely related species, Chrysoesthia sexgutella, which mines the leaves of the same plants and was a new find for me. This moth breeds twice each year, with the first brood adults flying in May/June and the second on the wing in August. You can see what the adult moth looks like on the UK Moths website. And my search for the rarer Chrysoesthia drurella continues.

Leafmines: Acrolepia autumnitella

29 Monday Sep 2025

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I don’t think I’ve seen leafmines on this plant before – this is Bittersweet (Solanum dulcamara), and the mines can also be found on other members of this plant genus, Tomato (S. lycopersicum) and Potato (S. tuberosum), as well as on Deadly nightshade (Atropa belladonna).

The miners here are the larvae of the moth Acrolepia autumnitella, a very pretty little chestnut-coloured creature, which is shown on the UK Moths website. As you can see in my images, the larvae create quite large blotch mines, and these can be found twice a year, in June and September. I haven’t yet found a pupa but I will keep looking because the silk cocoon that surrounds the pupa looks rather lovely, as a photo on the British Leafminers website shows.

Leafmines: Coptotriche marginea

15 Monday Sep 2025

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Today’s leafminer is one of two I found before I went away on my latest little mini break (I’ll feature the second in next Monday’s blog post). These bright white blotches, shown here on Bramble, but also found on other Rubus species, were made by the larvae of the moth Coptotriche marginea. Here’s a link to the UK Moth website’s entry on this moth, if you want to see what the adult looks like.

The female moth lays her egg on the upper side of a leaf, then, when the larva hatches, it chews into the leaf and initially creates a linear, gallery mine (you can see this in the third of my images, below), before the mine widens out to form a blotch. My photos below show the upper and under sides of each leaf.

This species is bivoltine; the first leafmines can be seen during July, while the second brood feed right through the winter months, from September to March. I guess staying inside a leaf is a cosy enough place to spend the winter, as long as your leaf doesn’t wither and die during the colder months.

More moth appreciation

10 Wednesday Sep 2025

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It’s moth appreciation time. Here are a few recent finds …

I thought it would be interesting to place these two ermine moths together so as to show their differences. On the left is an Orchard ermine (Yponomeuta padella), on the right a Bird-cherry ermine (Yponomeuta evonymella). To identify these and the several other species of ermine moths, you need to look carefully at the patterns of their spots and also at their food plants. The Bird-cherry has five rows of black dots on the forewing, so is quite distinctive. The Orchard ermine is very similar in appearance to a couple of other ermines, the Apple ermine and the Spindle ermine, so knowing their food plants is a great help (for the Orchard, they are Blackthorn, Hawthorn and Cherry, while the key to the other two is in their names, Apple and Spindle).

The Mint moth (Pyrausta aurata) can also be a bit tricksy to ID, as it’s very similar to the Common purple-and-gold (Pyrausta purpuralis), but the latter has distinctive light spots on its hind wings, which the Mint moth does not. Unsurprisingly, the Mint moth is often found on or near plants from the Mint (Mentha) family.

This, in my opinion, is the loveliest of today’s moths, the Mother of pearl (Pleuroptya ruralis), named for the pearlescent sheen of its wings. I must remember to look for its larvae, which feed in rolled-up leaves on Nettle plants (I can feel those stings already!).

For me, seeing a Rush veneer (Nomophila noctuella) – or, usually, several Rush veneers in one day – means warm winds are blowing from the south, bringing in migrating insects from Europe. And they are exactly the weather conditions we were experiencing over a couple of days very recently, when I saw more than six of these moths in just a few hours during a coastal walk.

Leafmines: Bedellia somnulentella

08 Monday Sep 2025

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I’m particularly pleased to share this new leafminer as it’s not often that I find the signs of the mine, a larva within said mine, larvae resting outside their mines, and also a pupa, but here they are. These were found during two walks around the edge of a local recreation ground with, perhaps surprisingly, the pupa being seen on 9 August, a couple of weeks before I found the larvae (on 27 August) on plants that were a couple of hundred metres from the initial find site.

These mines are the work of the larvae of the moth Bedellia somnulentella, the adult of which is something of a ‘little brown job’, as you can see on the UK Moths website. The larval plants include both Field bindweed (as shown here) and Hedge bindweed, as well as Morning glory, and, though the mine begins as a gallery, this appears to be subsumed by the later blotch, as blotches were all I noticed.

These larvae have some interesting habits: they weave silken threads below their mines to create resting places outside their mines (an unusual habit). The threads would not be easy to spot, except for the fact that the larvae’s frass is also caught by them and so appears as scattered clumps and strings of pooh.

When they’ve finished feeding and their development is complete, the larvae exit their blotches and pupate suspended amongst their silken threads. They’re fascinating little creatures.

 

A good year for Jersey tigers

30 Saturday Aug 2025

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In the summers of 2018, 2019 and 2020 one of the local nature reserves near me held what seemed like a healthy population of Jersey tiger moths (Euplagia quadripunctaria), then they vanished. I don’t know why this was but several people have looked for them at the reserve in the intervening years and, though the occasional single moth has been sighted, the healthy population is no more. Away from that reserve, I would struggle to see any Jersey tigers, and saw none at all in 2021 and 2022.

So, this year, it has been an absolute delight for me to have enjoyed many, seemingly random sightings of these beautiful moths. By random, I mean that there haven’t been any large numbers concentrated in any specific location or area; instead, either I’ve spotted them lurking on trees and bushes, or my passing has disturbed them, there’s been a flash of their vibrant orange underwings as they’ve fluttered out and I’ve seen them once they’ve resettled.

And it seems my experience of seeing greater numbers of Jersey tigers this year has not been unique. This is a species that is included in Butterfly Conservation’s Big Butterfly Count, and, even before the count had ended, with 7 of the count’s 24 days remaining, that organisation had noted a ‘whopping 78%’ increase in reported Jersey tigers this year compared to last year. Butterfly Conservation’s blog post speculates that the dramatic increase was due to this summer’s record-breaking high temperatures.

As Dr Richard Fox, BC’s Head of Science is quoted as saying

The increase we’re seeing in Jersey Tiger moth sightings is a striking example of how climate change is reshaping the distribution of wildlife.
While it’s a delight to spot such a vibrant moth in gardens, parks and green spaces, it’s also a reminder of how rising temperatures are altering our natural environment.

Leafmines: Phyllonorycters on Alder

14 Monday Jul 2025

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It’s been a while since I’ve blogged about a new leaf-mining moth, and today you get two for the price of one.

You see, the larvae of both these moths mine the leaves of Alder trees, creating a blotch with a single strong crease along the mine’s centre but, fortunately for those of us trying to identify these mines, there is one vital difference: the larval mines of Phyllonorycter rajella (below) can be found on the underside of the leaf, whereas the mines of Phyllonorycter stettinensis (above) are on the upper side of the leaf.

Both moths are bivoltine, i.e. they produce two generations each year; in both cases, the adult moths are active in May and again in August, so there’s a good chance of seeing the mines right through the summer. Amazingly, I’ve actually seen the adult Phyllonorycter rajella moth several times – two instances are shown below, but you can see better images of the very pretty adult moths of both these species on the UK Moths website: click the name to see Phyllonorycter rajella here, and Phyllonorycter stettinensis here.