327/365 Stigmella leaf mines

23 Saturday Nov 2019

Posted by sconzani in autumn, insects, leaves, nature

Tags

bramble leaf mines, British leaf mines, British moths, Golden pigmy moth, leaf mines on brambles, leaf-mining moth, Stigmella aurella, stigmella species

Before the heavy rain came in yesterday I managed a quick local walk, part of which was to look at maple trees for the leaf mines of a tiny moth called Stigmella aceris, which has slowly been expanding its range in south Wales. I didn’t find any on the few trees I looked at, though I will continue to look and will report back here if I do manage to find any.

I decided to switch my focus on to another of the Stigmella moth species, Stigmella aurella, the Golden pigmy moth, which lives its larval life in mines burrowed in bramble leaves. Though you might never see the adult moth, you will undoubtedly be able to find its leaf mines as they are common and widespread throughout most of Britain, and I easily found several examples during my local meander. Now to find the maple-leaf-burrowing variety!

On the bramble

26 Wednesday Dec 2018

Posted by sconzani in fungi, insects, nature, plants, walks, wildflowers

≈ 4 Comments

Tags

bramble, Grooved bonnet, leafhopper, leafmine on bramble, Mycena fungi, Penarth to Lavernock coastal path, south Wales coastal path, Stigmella aurella, Wales Coastal Path

I took myself on a meander along the south Wales coastal path from Penarth to Lavernock and back again today. The weather was still quite gloomy, as it’s been for several days now, but at least there was no rain. I often have this trail to myself but not today – every man, woman, child and their dog had obviously decided this was a good way to walk off their festive feasting. As I had made it today’s mission to look for the little, I got a lot of strange looks, and I heard one or two ‘What was that lady doing?’ comments after people had passed. To their credit a couple of folk were brave enough to ask me directly but their eyes glazed over when I began to extol the beauty of the many leafhoppers I was seeing.

181226 on the bramble (1)

I saw lots of lovely things but thought, for the purposes of this blog, I’d focus on the Bramble (Rubus fruticosus agg.), which grows in abundance along the coastal path and, with this year’s mild weather, is still very green, and even flowering in places.

181226 on the bramble (2)

I haven’t yet had a chance to identify my finds but I think I have photos of three different species of leafhoppers (though it’s possible number 3 is just a yellower version of number 1). I was amazed to see so many of these little critters still flying and hopping around the bushes, though the winter has been very mild here so far and I think some species over-winter as adults.

181226 on the bramble (3) 181226 on the bramble (4) 181226 on the bramble (5)

I also spotted a couple of other tiny mini-beasties lurking amongst the leaves. I’m not sure what these are.

Lots of the leaves had leaf mines, though their makers have now left the leaves. I think most of the mines I saw would have been made by the larvae of Stigmella aurella, a moth.

181226 on the bramble (8)

And my last find was on an old, decaying Bramble branch, where these beautiful little bonnet fungi were growing. Though you can’t see the details in this photo, the caps were striated and the stems grooved so I think these might be Grooved bonnets (Mycena polygramma).

181226 on the bramble (9)

Leafminer on bramble

29 Monday Jan 2018

Posted by sconzani in insects, nature, plants

≈ 6 Comments

Tags

bramble, British micro moth, British moths, Golden pigmy moth, leaf mines, leafminer, moth larvae in leaf mines, Rubus fruticosus agg, Stigmella aurella

Following on from my Leafmines 101 post and the one about leafminers on Hart’s tongue fern, here’s another leaf mine I think I can identify (note the ‘I think’!).

180129 Stigmella aurella on bramble (1)

The reason I’m hesitant about positively IDing this one is because there are two species of micro moth whose larvae produce very similar mines on bramble (Rubus fruticosus agg.) leaves. One is the Glossy bramble pigmy moth (Stigmella splendidissimella) but the more likely in this case is the Golden pigmy moth (Stigmella aurella).

Though it’s very common and widespread in Britain, I’ve never seen this tiny moth (images on the UK moths website here) but the mines its larvae create on bramble leaves are everywhere I look. As you can see, the mine starts out small but, as the larva within chews and chews, so it widens its mine to accommodate its expanding girth.

You can see if the inhabitant is still at home by holding the leaf up to the light. Most of these seemed to be empty, as you can see from the images below (the central black lines are the frass). I’ve never actually opened a mine to have a look at the larva when it has been inside but, if I did, I would see an orangey-yellow grub with a brownish tinge to its head (there are images on the Bladmineerders website here).

180129 Stigmella aurella on bramble (4)