The Wildlife of the Parc Naturel Régionale Perigord-Limousin - Our Butterfly Effect

Updated: Oct 23, 2019

female common blue

We're feeling a bit glum and at a loose end here at the mill. Our last guests of the main season left the other day, and though we have lots to do we feel a bit deflated and flat after such a busy and fun summer.

It does give us a bit more time to do lots of much neglected paperwork though. As a displacement activity to distract me from what I was supposed to be doing (paying my taxe fonciere) I started writing an article for a Butterfly Newsletter which will come out in the spring. Nik began sorting through the wonderful photos he took during the summer and to cheer everyone up I thought you might like to review some of our butterfly highlights of 2019.

small pearl-bordered fritillary

There are an embarrassment of fritillary species at Le Moulin de Pensol. Our first glimpse of just what a magical piece of land we had acquired came from one of these. One day while walking the dogs on one of our fields we noticed groups of hairy black caterpillars in clumps. There were perhaps 100 clumps each containing about 200 caterpillars. Closer inspection revealed they had bright red eyes. We took to the internet to identify them, and the hive-mind of Twitter and Facebook soon revealed them to be the caterpillars of the Glanville fritillary butterfly. We were so excited and we woke in the night worrying about them during sharp thunderstorms. This year the population is even larger, and we have learned to tell them apart from our other fritillarys – heath, false-heath, queen of spain, silver-wash, pearl bordered (and small pearl bordered), false meadow, weavers and knapweed!

Coming as we had from the Norfolk Broads, we were no strangers to swallowtail butterflies, but were entranced by the numerous specimens of scarce swallowtail which flit around the buddlea trees in the summer. The French call these flambé – which describes them perfectly. Swallowtails (left hand or first photo) are also present, but they seem quite different to the Norfolk form.

Another species which seem to be virtually unrecognisable to me in France is the speckled wood. In the UK I thought of these butterflies as mildly coloured, brownish with yellow spots and confined almost wholly to woodlands. In France we find them out in the meadows and to me they seem to show up in the field as intensely chequered and more orange than yellow and brown. In fact I often say to Nik “what’s that fritillary” - only to have him roll his eyes and reply “speckled wood again”. I am told that this is because we have the southern European version here, but it looks like a completely different species to me.

Some of my favourites are not large and showy and have to be courted and watched quietly for some time before they give up their significant but more subtle charms. The small coppers are just so beautiful. The third flight at the end of the summer always seem so tiny and intensely copper coloured they are like tiny flying brooches. I think one of the best butterfly photos Nik has ever taken was of the humble ringlet. Its “eyes” showing up so beautifully against the brown of its underwings. Sometimes the meadow browns and walls demand that you pause and watch them in the meadows. Frumpy and brown as they may look in the ID books – in the field when newly emerged they are beautiful.

The blues are all delightful. At the end of the summer they gather together on the large clumps of Michaelmas daisies that we grow just for this purpose, and if you brush past them they rise in a cloud of fluttering blue, like petals.

Mazerines are out at the moment as I write (in late September), and while it’s difficult to pick a favourite, this is definitely a contender. The females sit on a flower, with their wings outstretched soaking up the last of the summer sunshine, and lull you into thinking they are dull brown. Then a lazy, insouciant flap of the wings makes them shimmer and pulse with metallic blue sheen, like the chameleon paint jobs that were all the rage on concept cars about 20 years ago. Or that dress on the internet where you couldn't tell if it was one colour or another.

Mazarine. Is it blue or is it brown?

We have seen the odd geranium bronze this year too. Interesting, as they are not native to this country (rather like ourselves), but like us enjoy its climate and abundant pelargonium geraniums. A sweet, small curiosity of a butterfly.

I have also been fascinated by the maps. I had never heard of this species when in the UK and they are everywhere here. Confusingly changing their patterns drastically from first to second brood, and then varying the pattern again for the third brood. The first look a little like tortoiseshells or commas, to my eyes predominantly orange. The second flight is completely different and you would swear they were a different species, much more like white admirals. The map pattern from where they get their name is very striking and visible only on the first brood form on the underside of the wings.

An exciting spot of a large copper last year brought the number of species we have seen in our garden and grounds to 60. This felt like an important number to us as we were aware that there are 59 species which are resident or regularly recorded in the UK. So we were now able to say that we can see more species in our gardens and land than in the whole of the UK!

With this abundance of butterflies comes a great responsibility. We want to increase both the number of species we have on our land but also the populations of each species. I used to work with farmers in the UK, trying to get them to farm in a more environmentally sensitive way. We would take them out onto their land in January and February and ask them “where are your pollinators now”. The point of this was that everyone is keen on butterflies in June and July, but of course unless you give them a place to overwinter and complete their life-cycle, you don’t get to enjoy the good bit of watching the adults in the summer. At Le Moulin de Pensol we try and make sure that throughout our land we have appropriate food plants, nectar plants and lots of safe places to overwinter and pass on to the next stage of the life-cycle whether as an egg, larva, pupa or adult.