Birth notice

17 Saturday Mar 2018

Posted by sconzani in insects, nature, plants, wildflowers

Tags

Ficaria verna, flies, fly, leaf mines, leaf mining fly, leafminer, Lesser Celandine, Phytomyza ranunculi

I was handing out the cigars last Monday!
Now, you might well think me more than a little mad to be excited about the birth of a fly but this was the first time I had tried rearing one … and it was actually successful, which bodes well for the fact that I’m intending to take part in a fly-rearing investigation this summer (more on that closer to the time).

The fly is Phytomyza ranunculi, a creature whose larvae often make their home in the leaves of Lesser celandine (Ficaria verna). I blogged about this leafminer, its larvae and the pupa here, and it is that pupa which finally hatched earlier this week. I had been told it would take about 3 weeks to hatch but it was, in fact, longer than that – it was 6 February when I found the pupa and 12 March when it hatched, so 34 days in total.

180317 Phytomyza ranunculi (1)

Now, here I must admit to a rookie error. As it was well over the 3 weeks, I had almost given up on its hatching so, on Monday night, when I had a sudden notion to open the container, I didn’t look inside first. The fly popped straight out, perched on the edge for a very brief time – and I managed to get just one photo, and then it flew off. I’ve searched for it in my flat, and it did a quick fly by when I was washing the dishes yesterday, but I haven’t been able to find it, neither to take more photos nor to let it outside.

Leafminer: Phytomyza ranunculi

11 Sunday Feb 2018

Posted by sconzani in insects, nature

≈ 2 Comments

Tags

Buttercup, fly, fly larva, fly puparium, leaf mine on buttercup, leaf mine on Lesser celandine, leaf mines, leafminer, Lesser Celandine, Phytomyza ranunculi

You might think there are no insects around in winter but you’d be wrong, as I’ve been discovering in the past week or so. In my checks for blooming wildflowers, I’ve seen the odd Lesser celandine and Buttercup flower and, looking more closely at the plants, I’ve noticed leaf mines on some. And where there are leaf mines, there are insects laying eggs and larvae developing from those eggs to create the mines.

These particular mines are created by Phytomyza ranunculi, an incredibly tiny fly which I haven’t yet seen. But I have seen – and can show you here – a larva and a puparium. I brought home a couple of Lesser celandine leaves, intending to take better photos of them, but I didn’t reckon on them shrivelling up overnight. On the positive side, when I picked up one leaf, a tiny larva was sitting underneath, presumably having popped out of the leaf as it dried up.

A couple of days later I brought home another couple of leaves, for the same purpose, but this time left them in a sealed container. The next day, when I opened it, I saw this tiny speck in the bottom of the container and realised a larva from one of the leaves must have pupated. I’m trying to hatch it so I – and you – get to see the fly. Fingers crossed!

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)

A mini challenge

09 Monday Oct 2017

Posted by sconzani in insects, nature

≈ 8 Comments

Tags

biodiversity, Cosmeston Lakes Country Park, flies, galls, leaf mines, Speckled wood, spiders, spotting insects

On Friday I went for a wander around one of my favourite local haunts, Cosmeston Lakes Country Park and, while there, I set myself a little challenge. How many critters could I find in one small area, perhaps no more than 2 metres square?

171008 mini challenge

My challenge wasn’t pre-planned: I had seen very little at this point on my walk and was thinking to myself that this was due to autumn and the cooler weather but, when I saw a Speckled wood butterfly at this particular spot – a bank covered with shrubs and small trees – I started wondering how much more there was that I simply wasn’t seeing. So, I stopped and looked harder. There was no poking under grasses or bushes, no sweeping or brushing to encourage movement, just focussing my eyes and ears to really see and hear.

There were, in fact, three Speckled woods – I just hadn’t noticed the other two, plus three different species of spider (the Garden spider was lunching on another critter but it was partly consumed and too tiny to identify), one hoverfly, three species of flies, a gall on Bramble that would’ve been home to the larvae of the tiny gall wasp Diastrophus rubi, and a leaf mine, made by the larva of some unidentified mini-beast. And I’m absolutely sure I didn’t spot everything!