Tag Archive: Lesser Yellow Underwing


Ruby Tiger (project 2B), Murlough, 13 Jul 2011

I usually name my children. (!!!) Say hi to “Ron” 🙂

For those of you who haven’t been following this blog and/or don’t know me, one of my favourite hobbies is rearing caterpillars. It all started when I was primary school age: during the summer the nasturtiums in our garden would become infested with Large White butterfly caterpillars. One time I decided to collect three of them, put them in a container which was supposed to be used as a wormery along with some nasturtium leaves, and see what would happen.

Unfortunately I never got to see what happened – they all escaped (I suspect my sister had a hand in it, but I’m not sure) and the two that we found crawling around upstairs were promptly placed back outside.

Although nothing came of it and although I never made any notes and although I haven’t even the foggiest idea what year it happened, I consider it such a pivotal moment in my life that I called it “Project 1A”.

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Since then, I’ve worked with more or less 22 species of butterfly or moth. The projects may be rearing projects like Project 1A should have been – I find the caterpillars full grown, young or sometimes not even hatched out of their eggs, and take them home. I feed them leaves and keep them in sheltered containers as they grow, pupate (enter the ‘crysalis’ stage of metamorphosis) and eventually emerge as butterflies or moths. Then I release them exactly where I found them.

My first major project, when my ‘inner butterfly’ at last fluttered into live in late 2009, was my ‘Brown Furry Caterpillar Experiment’ (project 2A). I described this project in detail in my post last year “My caterpillar rearing projects: Ruby Tiger“. It involved 8 Ruby Tiger caterpillars which I collected from Murlough NNR – half I kept outside over the winter where they hibernated, while the other half I kept indoors. In the warm conditions the latter four began the pupation process. I hoped that they would all turn into moths, that they would mate and I would be able to release lots of eggs in the spring! Sadly two had parasites, and another died for no apparent reason, leaving only “Ruby-wan-kanobe” – she emerged from her pupa as a beautiful little red-brown moth but had no-one to mate with.

Happily one of the outside caterpillars, “Ricky”, successfully pupated and was released back where I found it in Murlough in the springtime.

Since then the Ruby Tiger caterpillar has become the figurehead of my blog.

Blog Figurehead: Ruby Tiger caterpillar (project 2A), 20 Feb 2010

Recognise him?

Not all of my projects are so extensive as that one. Sometimes I just collect pupae and give them a bit of safety in a jar until they emerge. In some cases the project just consists of keeping an eye on a particular species in an area (eg. the Marsh Fritillary, project 6. In this case it would be illegal for me to collect the caterpillars as it’s an endangered species).On one occasion I collected sawfly larvae (related to wasps, bees and ants) by accident (project 14A). Another time I collected a dead Knotgrass caterpillar, thinking it was alive (project 10A)!

Unfortunately the living ones don’t all make it – disclaimer: this is usually not my fault. Oftentimes they’ve been parasitised by ichneumon ‘wasps’, Tachinid flies or had fungal infections.

But I admit, I have had some ‘haemolymph on my hands’ (that’s insect blood, spot the entomological metaphor-hijack). It’s never intentional – last summer I collected a whole batch of Cinnabar moth eggs by accident (they were on a Ragwort leaf which I collected to feed my Garden Tiger and Ruby Tiger, projects 5B and 2B). It is incredibly hard to muck out a jar with twenty-six tiny caterpillars in it, and in the unsanitary conditions I lost them all (project 15A).

Cinnabar caterpillars (project 15A), 27 Jun 2011

Lovely things caught in unfortunate circumstance

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But “what about now, what about today?

The story is…

Project 13B: Mother of Pearl (Pleuroptya ruralis)
Sadly this caterpillar, which I collected from the nettles in my neighbour’s garden a few months ago, has died while preparing to pupate. I don’t know what killed it.

Project 15B: Cinnabar (Tyria jacobaeae)
After the disaster with the batch of 26 eggs, I collected four large, healthy caterpillars from Murlough, two of which successfully pupated and are still pupae at this very moment in time. As with all my other pupae, they are in soil in a jar in my back yard, and when they emerge it’ll be a matter of taking lots of good photos and releasing them back where I found them.

Project 16A: Buff Ermine (Spilosoma luteum)
This is probably one of my most successful projects: I found two of this species of caterpillar in my back garden (they were quie young) and fed them various weeds as they grow from 25mm to over 40mm. Like the Cinnabars, they have spent the winter as pupae, and appear to be still healthy.

Project 17A: No-one has the foggiest idea what this one was.
Five large plain green caterpillars on a very distinctive scented herbaceous plant, and I don’t know what either of them are. I posted pictures on Back Garden Moths to see if anyone on this forum could identify the caterpillars – but to no avail. One of the larvae, “Pippin”, I collected and it pupated but unfortunately died. This was the pupa I described in my posts “Gutted” and “Ungutted” – I thought it was dead, then I thought it moved (as pupae of the Noctuid family can). Now I’m sure it’s dead – it appears to be decomposing. Yuk.

Projects 18A and 19A: Garden Carpet and/or Flame Carpet (Xanthorhoe sp.)
A green ‘looper’ caterpillar I found on the wall in my back yard is now a pupa – this is project 18A. I don’t know whether it’s the same species as the five loopers I had on a wild plant in my back yard around the same time (project 19A), two of which I collected for pupation but which died. Hopefully the pupa has survived the winter and should emerge soon and shed some light on this identification mystery.

Project 21A: Lesser Yellow Underwing (Noctua comes)
The pupa, which I found as a caterpillar in my back yard earlier this year, is still healthy – it wiggles when I touch it! It will probably be the last of my pupae to emerge.

Project 22A: Wood Tiger (Parasemia plantaginis)
This project began and ended last weekend at the family caravan at Murlough. I collected one Wood Tiger caterpillar from Murlough on the Saturday and it began pupation prep: spinning a silk pad on its container as a base for a cocoon to pupate in. I decided to release it the next day as I already have too much on my plate! Besides, it will be much happier to emerge in the place where it belongs, and not have to endure a car journey from Newcastle to Belfast and back!

This has probably been the longest post I have ever written! Please don’t tell my teachers I spent two hours doing this when I should have been revising!!

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Metamorphosis begins

Lesser Yellow Underwing caterpillar (project 21A), 7 Apr 2012

A face that only a moth-er could love!

In an earlier post I introduced “Lesley”, the Lesser Yellow Underwing caterpillar I found in my back yard last month. Since I brought him indoors he’s been devouring elder leaves, growing to an impressive 47mm!

Lesser Yellow Underwing caterpillar (project 21A), 8 Apr 2012

Part moth, part ostrich.

On 8 April I found him with his head buried in the compost I had put in the bottom of his container! The caterpillars of many moth species pupate underground, and this is exactly what Lesley was preparing to do. In the following 9 days he completely buried himself, and made a small ovoid cocoon of silk and compost which he diligently repaired each time I made a hole to look inside! On the evening of 17 April I had another look inside, and rather than a pale caterpillar it was a dark red pupa that I saw!

Lesser Yellow Underwing pupa (project 21A), 18 Apr 2012

Lesley's Makeover

And so, after this photo shoot, I moved him back outside, in a peanut butter jar with compost, a twig to climb on when he emerges as an adult moth, and the all-important Holes In The Lid.

That makes seven pupae in jars under the cotoniaster bush. I am going to be one busy father some day soon.

Project 21A: Lesser Yellow Underwing

Lesser Yellow Underwing caterpillar, 01 Apr 2012

LESser YELlow Underwing... Lesley!

My latest caterpillar rearing project is a caterpillar I found in my back yard last Wednesday — a Lesser Yellow Underwing. It’s a moth I’ve never seen before so I’ll be taking very good care of it to make sure it reaches adulthood this summer.

Lesley, as I’ve called it, is a bit like a Weeping Angel (out of Doctor Who). It does move around and eat quite a bit, but every time I go to look at it it’s stock still. This is probably its response to light and/or movement (it’s a nocturnal caterpillar so every time I turn off the light to look at it it stops  what it’s doing).

It moulted a few days after I collected it – the photo above is post-moult. I’m not sure what instar it’s at — probably last or penultimate as these caterpillars  reach around 40mm and it’s currently 32mm. It’s very fond of elder leaves.

I’m keeping it indoors in an ASDA lemon yoghurt tub with airholes, 1.5cm of compost in the bottom, a pine twig to climb on, and the all-important vegetable matter.

And that’s project 21A in a nutshell.

Species study 21, project A: Lesser Yellow Underwing (Noctua comes)