Beetles in the Firewood in France

Every year in France, usually from about February, some people find their houses invaded by small red or reddish-brown beetles. This is by no means everywhere and many people will never see one, however where they are present they can sometimes be observed in relatively large numbers.

The creature concerned is a Longhorn Beetle, Pyrrhidium sanguineum, although being only 8 to 12 mm it is rarely recognised as being one. Known in English as Welsh Oak Longhorn Beetle and its common French name is La Callidie Sanguine).

Females lay eggs in crevices in dead or freshly cut wood with bark that is exposed to the sun from March – June and are polyphagous in nature using a range of deciduous trees, but with a preference for oak (Quercus spp.).  Larvae burrow into the timber making galleries up to 60cm in length where, when fully grown, they pupate.  They can’t use seasoned timber and usually have an annual life cycle, occasionally this can be two years.

When this wood is stored or kept for a while in the home or perhaps a garage as firewood the adult beetles tend to emerge earlier due to the higher ambient temperature. Where firewood is stored outside in proximity to the home they may be seen a little later in the year when it is warmer.

Fortunately for us we don’t need to worry as they are completely harmless in our homes and can be popped outside where they belong.

Chris

Hedgerows and Dry Stone Walls in France

As soon as we start to take a look at either Hedgerows or Dry stone walls it soon becomes clear that in France as in many parts of the UK it’s difficult to talk about one without the other.

Although there have been what could loosely be called hedgerows to some extent in France since before Roman times they really started to come into their own in the 16^th and 17^th centuries as the available land not already owned by the nobility or the Church was eagerly snapped up by the wealthy middle classes, the bourgeoisie urbaine. They used hedgerows to define their boundaries, to protect their crops and to prevent other farmers from grazing their land. Apparently hedge laying, (plessage), was widely used throughout France but has disappeared without a trace in many regions since the 1960’s and I have yet to see an example or a remnant in our region.  From the end of the 19^th century and into the first half of the 20^th century the industrialisation of agriculture started to change the face of the countryside only interrupted by the two world wars that France was subjected to. Following the second world war with mechanisation the changes to the nature of our landscape and the removal of hedgerows gathered pace, something that was given greater impulse with the land consolidations of the 1970’s and 1980’s and the move towards larger and larger fields when much of our hedgerow network was lost. All in all it is estimated that France has lost an astounding 2 million km of hedges and this is certainly not without its consequences.

Click on images to expand 

Above - Hedgerows take up farmers land.

Below - The convenience of removing them.

Throughout the same timescale we see the rise and literally the fall in the use of stone walls for enclosures, (murets de pierres) or sometimes a combination of the two, a dry-stone wall with a hedge. These can be found today in many parts of the region although the walls are often dilapidated and only partly standing other than when maintained around gardens. To most landowners they are generally at best of no interest or even a hindrance to their activities. Again the losses have been massive.

Above - remains of dry stone wall and hedgerow

Hedgerows come about in different ways, for different purposes and will contain different species. Leaving garden hedges aside from a strictly practical perspective for most farmers and landowners that meant making use of the most robust and abundant natural species that were probably growing there in the first place. Most people will know what they are, especially if they have a bit of rural land. Bramble, blackthorn, hawthorn, hazel, spindle, chestnut, oak, box, field maple, elm, beech, holly, ivy, dog rose and wild privet are all typically found and can provide a dense livestock barrier when managed correctly and do a rather good job of keeping people out as well.  Correct management, in this case, is keeping the hedge height and shape compact with a height of around 1.5 to 2.5 metres and a width of 1 to 1.5 metres. This will help prevent gaps appearing, something I see too often here where even newly planted hedgerows are simply left to grow into a row of closely planted trees with huge gaps and limited usefulness, however the occasional tree here and there that is allowed to mature as part of the hedgerow can be beneficial. 

 Above - Hawthorn berries 

   Below - Rosehips on Dogrose  

As mentioned there is little practical need for hedgerows by landowners anymore, indeed in my conversations with local agriculteurs they are often proud of the wide open landscapes with no nasty hedgerows to obscure the view and make life difficult. Where required the introduction and easy availability of metal wire, stock fencing and electric fencing has done away with the requirement for hedgerows. Whilst not wishing to blame them it needs to be understood that hedgerows and dry stone walls have a usefulness and long-term economic value both to farmers and wildlife that only too often hasn’t perhaps been considered or taken into account.

Hedgerows and Dry stone walls provide unique habitat structures that are completely different to anything else including woodland. Importantly they heat up and retain heat in a completely different way that provides protection and breeding habitat for birds, reptiles and mammals as well as a vast number of insects throughout the year. Another feature which will have been noticed by anyone that walks in the winter is that they provide fantastic windbreaks giving shelter from wind and driving rain on the lee side. This same wind break action helps to prevent the soil erosion that results from modern cereal production methods; in fact soil erosion now affects most of the main cereal growing areas in France and other major agricultural production regions and can amount to several tonnes per hectare every year. Given it takes around 500 years for just 2.5cm of topsoil to be created amid unimpeded ecological changes this is a resource we must conserve.

Good dense hedgerows will also build up a mass of living debris at the base, something that takes many years to establish and is of great value to both wildlife and maintaining the soil structure, somewhere for vast numbers of ground beetles and other insects to survive that will, in turn, provide food for hedgehogs and small insect-eating birds. As well as the bushes and trees that make up the hedgerow there will be numerous native flowers that find a place at the base, far too many to name here with native climbers such as Honeysuckle and both Black and White Bryony and White Bryony  provides food for the Bryony Ladybird, Henosepilachna argus, that eats the leaves. 

 Above - Bryony Ladybird

Below - Bryony Ladybird Larva eating Bryony leaves

Everywhere we look we find that all of the plants and the shrubs that are part of this structure will all have an importance to other species with many having unique or specific requirements.  Leaves provide food for specialist caterpillars, flowers provide nectar and pollen for different species of bees and other pollinators, broken hollow bramble stems are where the Small carpenter bee, Ceratina cyanea, a very small solitary bee species you may hardly notice lay their eggs. No article about hedgerows could leave out the importance of all those berries many of which rely on being eaten to be distributed far and wide having passed through a bird or a mammal. Blackberries are perhaps the most widely eaten of all our native berries, Birds, Pine and Stone Marten, Wasps, Hornets, and various other insect and fly species all have their share, not to forget humans. Hawthorn berries and Rosehips are sought after by the Thrush family, (Fieldfare, Redwing, Song and Mistle thrush), in winter when the weather is extreme and the ground is frozen. Hedgerows are also of huge importance to certain species of bat particularly Natterer’s bats and the two Horseshoe bat species, Greater and Lesser. Last but not least we will all have seen dead Barn owls by the side of the road and may even have been unfortunate enough to have collided with one in flight, I have and it isn’t a pleasant feeling. These collisions invariably occur where hedgerows have been removed for the simple reason that Barn Owls hunt by sweeping low across the land and a simple thing like a hedgerow pushes them up and over any traffic.

Above - Injured Barn Owl - one of the lucky ones

We have reached a point where although there is still a net loss of hedgerow each year the pace of removal is slowing; arguably it will be anyway because so much has already disappeared. Also there are land owners and sometimes communes that are planting new hedgerows and in the Vienne the LPO helps raise finance to plant hedgerows every year for a dozen or so small farmers that want to improve bio-diversity on their land.

In Poitou-Charentes the Association Prom’Haies provides a wealth of information and services to assist people in planting hedgerows located at :

Maison de la Forêt et du Bois - 79190 MONTALEMBERT - Tél : 05.49.07.64.02

mail : contact@promhaies.net

Web http://www.promhaies.net/  

Whilst welcoming all new hedge planting we do need to remember that a newly planted hedge will take many, many years to be anything like as useful as a hedge that has existed for 50 years or more so saving existing hedges should be a priority with continuity maintained wherever possible to preserve their role as wildlife corridors. Perhaps it’s worth mentioning that in December at Saint-Ciers-de-Canesse and Pugnac in the Bordeaux vineyards two 190 metre hedgerows have been planted to protect the school and its playground from spray drift following the 2014 poisoning of children in the Villeneuve School that resulted from spraying the adjacent vineyard. This type of planting is set to continue in other places where children are at risk.

As for the tragic loss of dry stone walls it unlikely that much can be done to redress this and it seems certain that most of those that exist in the open countryside will continue to disappear as they have no economic value. 

Chris 

Goat Moth - a spectacular caterpillar

Caterpillars can be some of the most spectacular and pretty creatures that we can encounter here in France and the caterpillar of the Goat moth, (Cossus cossus), is a classic example and it's the caterpillar that gives this moth its name as it emits a strong and rather unpleasant smell reminiscent of a male goat although having handled a few I’ve never been aware of it myself. 

The moth has a wingspan of 9cm or so, have light grey wings which are covered in black speckles.  Sadly I have never seen one and it may well be that there aren’t many where I live, (my wife did see a caterpillar about 10 years ago on a nearby track but nothing since), however this isn’t so unusual as apparently they aren’t regularly observed and the moth doesn’t feed. By all accounts they aren’t a common species and as we will see the larvae are regularly destroyed which may account for their decline.

Twice a year in May and October Hope Association holds a three day fund raising event at Clussais La Pommeraie in the Deux-Sevres departement of France where I have a table selling my honey. Some years ago my attention was drawn to a caterpillar someone had found and it was unmistakably that of a Goat moth that seemed likely to have emerged from a large Oak tree that is directly in front of the building that is used for the event. The tree had some damage in the form of exit holes but not a huge amount but this year when I was there a few days ago there was sawdust all over the ground at the base of the tree and clinging to the bark. Of course it’s probably nothing different from any other year except that this year we haven’t had any significant rain to wash it away. 

“”The eggs are laid, usually in small batches, in crevices or on bark of living trees near old burrows or other damage. Young larvae enter the tree, at first remaining under the bark, later boring deep into the wood on which they feed. The slow-growing larvae do not become fully grown until the third or fourth year. The burrows of the fully grown larvae are circular in cross-section and up to 20mm in diameter. Sap often seeps from the holes the larvae make at the trunk’s surface, with frass ejected from these, often accumulating at the base of the trunk. Trees can support one, a few or perhaps many larvae. Severe infestations can kill the tree, but this may take several years. In their final autumn, from August onwards, some larvae leave the tree, hibernating in a silk-lined cell in the ground. Other larvae remain in the tree. Pupation takes place in April and May, the larvae in the tree making an exit ‘window’ in the bark by gnawing away all but the outermost surface before making a silken cocoon in which they pupate.”” 

(Source: Butterfly Conservation.org)

There is no doubt that they can cause serious harm especially to fruit trees, usually older ones that have surface injuries and are considered to be an agricultural pest in orchards however in the case of large oaks the tree should be able to support their presence in the same way they do the larvae of Cerambix cerdo - Le grand Capricorne. 

A few photos of the tree concerned and one of the caterpillars from it. Click on photos to enlarge.

Chris

Winter work 2013 - 2014

Perhaps understandably many people I meet often have the strange idea that managing land for wildlife means doing nothing, just letting everything go and take its “natural” course. If only that was the case, which I suppose it could be if the objective was to allow everything to revert to woodland, but even there it would require managing in one form or another to maximise its benefits. Anyway there’s no shortage of trees in the general sense here – yet !!!

Where we live certain habitats have all but disappeared in recent years, the final nail in the coffin was the removal in 2008 of the requirement to put 10% of land out of production, a process known in English as “Set Aside”, (to leave fallow / en jachère). This has lead to just about every last piece of land that isn’t woodland and that can be used for cereals to be ploughed up as mentioned elsewhere. Even in 1996 when we purchased our house and three hectares things were bad enough leaving little choice for us but to at least try and create a little oasis of decent habitat and manage the bulk of it, (about 80%), as “rough meadow or natural grassland”. The remaining 20% was already trees or woodland which I have also been slowly changing aided by a couple of serious storms that helped with the thinning process.

This winter I’m trying to catch up on one particular section that has been neglected for a couple of years more than it should have been with a danger of some species being temporarily lost due to brambles, scrub and small trees swamping them.  

In particular there are quite a large number of Greater Butterfly Orchids that started to show after we had been here about 8 or 9 years on this part of the land and it’s a tricky balancing act with them. It’s quite strange that I haven’t found this Orchid anywhere else remotely near our property or the Loose Flowered Orchids that we have a couple of although they must have been around here historically. Bee, Pyramidal and Lizard Orchids that have also popped up on the land are to be seen locally in the area so not a surprise, but it does show what can happen even on land that has been intensively cultivated given a little time.

It’s also an area with a few different species of violet that need to be given a bit of light and space, all common species but important for the Fritillary butterflies we have here that use them - Weavers, Queen of Spain and Silver washed, all fairly common species as well but starting to struggle with the steady reduction of available plants. Many of the violet plants that do manage to survive are often by the roadsides that are constantly cut to the ground giving little chance for any eggs or caterpillars.

Masses of Lung wort, Pulmonaria, flourishes in this section as well and again although a common plant it’s just so important as a long flowering early insect food source, especially for Bumble bees when there is little else around in February. 

More of this later, Chris

Mistletoe everywhere

France is quite well known in Europe for its Mistletoe and exports large quantities every year to the UK for the Christmas celebrations, something it has been doing for well over 100 years.  Although its abundance here varies greatly from region to region where it does grow it really grows with a vengeance especially on poplar trees that have grown in the wetlands of France since before the second world war. However they have been planted in increasingly large numbers in recent years as a fast growing crop making use of boggy areas and places that are regularly inundated such as riversides. They are almost exclusively hybrids and there have been trials in France with Genetically Modified varieties, (GM or OGM). 

Environmentally these poplar plantations are a catastrophe destroying wetland habitat on a vast scale with a corresponding loss of species BUT money talks everywhere and nowhere more than in France where leaving a piece of land without it producing something is a cardinal sin.

I suppose, (grudgingly), I would have to concede that they have been a bonus for Golden Oriole that are particularly attracted to them to make their high nests but this doesn't even begin to compensate for the harm done. 

Mistletoe is a parasitic or semi parasitic plant with separate female plants that bear the fruits or berries and male plants that don't. It depends entirely on birds for propagation and I always thought of the Mistle thrush in this respect, never questioned it really, especially with the name association and the fact that it's one of the birds that will eat the seeds. However it seems in reality that the Blackcap is the best bird in this respect.

I found this really good web site all about Mistletoe so rather than crib from it, here's the link.

The Mistletoe Pages

Spindle trees and a sunny December day.

The sun came out and stayed out today, the cold wind dropped for the first time in weeks, nice enough to take time out from cutting and clearing this afternoon and just have a stroll to see what's about, maybe have a closer look at some of the birds that have been flocking in the last few weeks, many drawn in by the farmers plowing and exposing easy pickings. There are some quite large gatherings of Starlings of a thousand or more which may not seem a lot for this species but it's been many years since I've seen such numbers here. Mixed flocks of finches in the hundreds, predominately chaffinch, with smaller flocks of goldfinch which tend to keep to themselves. Occasional groups of Lapwing and Golden Plover moving around and some good size groups of Skylarks flying up from the wheat and oil seed rape fields. Otherwise nothing of any interest, a handful of Bramling, the usual groups of tits, (Great, Blue and Long tailed), the occasional Stonechat and the resident Buzzards, Wrens and Robins.

This is the time of year to look for the eggs of the Brown Hairstreak butterfly on this years growth of Blackthorn which it uses more or less exclusively. It's a butterfly that is quite common throughout the wider region but isn't that common where I am given there is still a reasonable amount of Blackthorn dotted around but maybe the eggs suffer destruction from the flail or cutters which are used to smash any remaining hedgerows back here in late autumn.

Anyway while I was doing this I caught sight of some Spindle berries catching the sun with the pink outer covers popped open revealing the rich orange seeds - simply stunning and I'm easily distracted !

Spindle trees are prolific where I live and can be found throughout the region wherever there is a bit of native hedgerow left. The wood of the European Spindle Euonymus europaeus is very hard and as the English name implies one of it uses was for making wool spindles in both the UK and France although the French name Le Fusain or Fusain d'Europe translates to "charcoal" another one of its uses and highly regarded by artists.

The caterpillars of the Spindle Ermine moth quite often cause panic for people that don't understand them as they will frequently strip a tree of its leaves in spring. Needless to say the tree recovers and grows new leaves and the following year it all happens again.

The Kidney spot ladybird Chilocorus renipustulatus  or Coccinelle des saules, (Willow ladybird), in French is said to be widespread but not common and today I chanced on half a dozen on the Spindle.  I assume this is because the Spindle tree hosts Black bean aphids in winter which would provide them with nutrition.

Some Hoverfly species are still finding some nutrition when conditions allow, especially on dandelions that we can often find flowering even in the midst of winter. The "Marmalade" hoverfly, Episyrphus balteatus is a common species that overwinters in its adult stage and is relatively abundant this year. It is among the very few species of hoverflies capable of crushing pollen grains and feeding on them which must give it an edge when food is scarce.

A couple of other species I spotted today that overwinter as adults providing they survive were a rather tatty Red Admiral and a Green Shield Bug Palomena prasinathe. It's a species that changes colour in winter to brown and often enter houses and other buildings for shelter. They are completely harmless and feed on tree leaves, this one is on Field Maple. 

Chris