Horned Osmia ( Osmia cornuta )

Osmia cornuta is one of the first solitary bees to emerge in spring and as such is an important pollinator of fruit trees such as apricots, plums and almonds. Present in most of Europe, (not the north), it is a species that has disappeared from most areas of intensive agriculture, but it survives well in some urban areas, wastelands, public parks and gardens in particular areas. 

Given this living where we do in the intensive cereal lands I was extremely pleased to see a group of these about midday buzzing around the table on the patio in the sunshine. At first I thought they were Osmia bicolor with their bright orange abdomens and black head and thorax, not easy to see when they don’t settle. Anyway, a little later Lynne called me to say that a couple were kindly putting on a performance for me on the table and providing a photo opportunity. 

Please Click on images to enlarge. 

They are closely related to both Osmia bicolor the Two Coloured Mason Bee and Osmia rufa, the Red Mason Bee and they behave in much the same manner. The female builds a nest in an elongated hole, often in an old branch or some other piece of timber. The majority of the holes are between 5 to 8 mm in diameter and the nest is formed with a series of cells separated by clay partitions. Each cell contains a food reserve formed by a ball of pollen and nectar, on which an egg is laid. If the gallery is too long, a dirt cap is raised by the female to reduce its size. As a generalist pollen collector they will use what ever is available according to season, this is taken to the nest and mixed with regurgitated nectar to make the so called bee bread which is made into a pellet stuffed into the cavity.  When the cell is half full following 10 to 30 trips, the female lays an egg and builds a front wall with some clay and then repeats this until the tunnel is full with up to 15 eggs and then seals the outside with a clay plug. She repeats this for about two months building one nest after the other.

When the eggs hatch the one that were laid first which are to be females develop more slowly. When fully grown the larva spins a light brown thread cocoon and transforms into a pupa.

The bee is fully formed in late summer but remains where it is until the following spring.

The mortality rate is very high; perhaps 60% or more never get to fly and in part this is caused by Cocoxenus indagator, is which a ‘fruit fly’ and a cleptoparasite of Osmia species that lays its own eggs in the bees nest when the bee is away foraging. Having said that it’s built in to the numbers of eggs produced so nothing to be concerned about as long as the habitat requirements are met. 

Places used for nests include - Hollow stems; Galleries in walls, soft stones or soil; Gaps in window frames and drainage holes; Old galleries dug by other species of Hymenoptera; Natural or artificial galleries in timber with holes of a diameter of 8 to 10 mm; Sometimes even snail shells as with Osmia Bicolor. Galleries are thoroughly cleaned before any eggs are laid and can be used almost indefinitely. All of these locations are available at our place and with no chemicals or poisons they should go on to thrive.

Definitely one to look out for in France.

Chris

La Réserve Naturelle du Pinail

Human activity has always changed the environment and in this article in 2014 I took a quick look at an extraordinary area that since 1980 has been the first and only State Nature Reserve in the Vienne departement of France, La Réserve Naturelle du Pinail which is located in the commune of Vouneuil-sur-Vienne, (86210). The Reserve is 30 km north-east from Poitiers and 15 km south from Chatellerault where it sits high on the plains between the river valleys of the Vienne and the Clain, at the north of the state owned Moulière forest. The reserve is well worth a visit, especially for people with an interest in Odonata, (Dragonflies and Damselflies) CONTINIUED HERE.

Chris

Harriers and their protection

It seems such a waste to restrict some of my articles to a limited audience when this blog and the web sites are viewed around the world and so I'm starting to put some on the web site.

This is Harriers and their protection from an article in 2014 for Living Magazine which is an English language magazine covering Poitou-Charentes, Dordogne, Vendée and Haute-Vienne in south west France.

The plains of Poitou-Charentes and Vendée whether they be the high open windswept areas such as those characterises by the areas to the north west and west of Poitiers towards Thouars and Parthenay or the vast low open wetlands of the Marais poitevin and coastline are especially suited to certain birds, some of which are under severe pressure at the European and National level making our region particularly important for their continued well being..............      

Read the article with photos HERE.

Living Magazine

Chris

Thistles and Dandelions

Very few people are neutral when it comes to certain native plants, (or weeds as they are often known as), especially the more robust and common types such as Dandelions and Thistles and I certainly don’t want them in my vegetable or flower beds. However they along with a few other native plants form the most important natural source of nutrition for many of our butterflies, bees, hoverflies and other flying insects growing as they do in a vast range of different habitats and are worth a second thought before trying to chop them down or poison them at every opportunity as is sadly the case in an increasingly tidy and over managed landscape here in France.

Click on pictures to enlarge.

Of course I don’t expect for one minute that anyone will suddenly think “Oh, I must grow some thistles or sow a dandelion patch” especially if they live in an urban environment or in very close proximity to their neighbours but I would like to encourage anyone with some land or with larger gardens to leave a few thistles and to perhaps let dandelions flower for a while just to see for themselves just how beneficial they are and how many different creatures use them.  

I also leave the seed heads to stand on all the plants in our fields which provide food for seed eating insects and birds throughout the autumn and winter months as well as providing a depth of ground cover for the birds that require it.

With this in mind I've compiled a simple web page with some photos of thistles and insects that have been mainly taken on our land.     CLICK HERE

Chris

Asian Hornet nest in my apiary - 2014

Cheeky or what?

You may find this a bit hard to believe and it certainly is an eye opener but now the leaves have started to fall Lynne spotted this yesterday when I was out for the day – an Asian Hornet nest actually situated almost directly over one of my hives and no more than 30 metres from several others.Click on photos to enlarge.

So what does this tell us? It tells us that maybe, just maybe, the Asian Hornet isn’t quite as dangerous to honey bees as has been thought. It also tells us to always be very careful when drawing conclusions based on limited third party information that may lack a solid foundation or without knowing all the surrounding facts of any given situation, something we can all learn a lesson from.

Of course this doesn’t mean that they can’t be a problem in some circumstances and it may be that they are modifying their behaviour, adapting to local conditions and taking other prey or simply that one Asian Hornet nest won’t have a serious impact where there are a large number of hives. As I have mentioned many times I have seen Asian hornets present around my hives ever since 2006/2007 without observing them being anything other than a minor irritation for my bees.

This one with the one I removed earlier this year from an empty hive makes me wonder just how many nests there have been within flying range of my hives but this is certainly fascinating for me, you can’t beat first hand experience.

Asian Hornets in a Bee hive

Asian Hornet in France

Chris

Very poor Honey harvest 2014

Churning out bad news isn’t fun but there is no avoiding the fact that honey yields continue more or less year on year to reduce in both my part and many other parts of France. This has nothing to do with any real or imaginary issues with honey bee populations but is simply a result of the amount of nectar that is available for any single bee colony to collect.

These days increasingly large swathes of France are used for growing cereals where it is the main use of the countryside.  I know I’ve said this many times but it’s fundamental in understanding what is happening with just about every non-woodland species you can think of being affected and needless to say honey bees are no exception. As a result of this massive change in the landscape honey bees and their keepers have become increasingly dependent on a couple of crops to produce surplus harvestable honey due to the loss of native habitat and related flora. This isn’t the same as a bee colony having enough for its own survival which it usually will have but about producing an excess that the bee keeper can remove.

Where I live there are essentially three main possible sources that can provide harvestable honey or at least the bulk of it.  These are Oil seed rape, Sweet Chestnut and Sunflower but all three are relatively short flowering and subject to weather conditions being right.

Right conditions in the case of Oil seed rape means a temperature of 16°C or more with good bee flying weather. As Oil seed rape usually flowers here in late March / April these conditions are often not met or perhaps only for a few hours in the afternoon. The flowers last from three to six weeks depending on the weather, (they will last longer in poor wet weather). Another issue with Oil seed rape is that the colonies need to have grown enough to really work the flowers when conditions are right.

The right conditions for Sweet Chestnut are simply long hot dry days, 20 to 25°C being ideal with a flowering time here usually around the second half of June / first half of July. Unfortunately in recent years it has tended to rain a fair amount in this period and heavy rain finishes the flowers off completely. The flowers last a couple of weeks or just a little longer.

Click on photos to enlarge.

The right conditions for Sunflowers to produce a decent yield are more complex and depend on both regular rainfalls while they are growing, then fine weather with a temperature of at least 25°C to produce a good nectar flow. The flowers last a couple of weeks or just a little longer and will be in flower between July and September depending on when sown.

Of course some people will have more favourable conditions and depend less on these three sources if they live in or close to a town, village or hamlet with an abundance of other flowers within flying range, sadly not the case for me although mercifully we do have our own three hectares with quite a lot of bramble and other honey bee flowers.

This year conditions just weren’t favourable for the three main sources where I live and the result was a honey harvest that produced about 25% of what it ought to be. Not a disaster personally but worrying as this is the way the countryside is going and it will lead to commercial producers quitting in even larger numbers. Crazy because we are continually being told that there aren’t going to be enough bees to pollinate the crops but it has to be understood that we need more than the agricultural crops to sustain our bees unless we are to become like large parts of the USA shipping the bees round the country in greater and greater numbers and loosing them in equally large numbers. Recent studies are showing that the best place for bees and many other species is in peri-urban situations but these are not usually places where it’s possible to have concentrations of hives.

So thinking positively and working with what I’ve got I’ve been raising, splitting and planting hundreds, (thousands), more plants in our fields to increase the quantity of bee / insect friendly flowers which if nothing else will look nice and provide the variety of nutritional sources that honey bees need to be healthy and at the same time be beneficial to a whole range of other creatures.

Chris

Pollen supplements and pollen traps.

Next time you buy or think of buying pollen for your "health" this is the true cost to the bees of pollen production.

Pollen is required by honey bees principally as a protein source to feed their larvae and maintain the colony population. As most people will be aware honey bees collect the pollen from flowers and transport it back to the hive using special hairy receptacles on their hind legs called corbiculae. It's an extremely energy intensive activity and efficiency is paramount in making sure that other colony activities aren’t diminished.   

Pollen trapping is dependent on the use of a screen or perforated metal grid of about 5-mesh per inch through which the pollen-collecting field bees are forced to enter the colony and this grid forcibly removes the pollen from their legs. This grid is used with a pellet collection container that is covered by 7- or 8-mesh screen to prevent bee entry. This basic principle is common to all pollen traps.

Click on photo to enlarge.

Of course what this means in practice is that the colony is starved of pollen and more and more bees will be diverted from other duties to pollen collection in an attempt to feed the colonies brood. What makes this situation even worse in recent years is that the bees are increasingly fed artificial pollen using soya flour made into patties via the top of the hive a practice that I consider to be total folly. It’s quite clear, (and there are studies to prove it), that healthy bees require a variety of natural pollens in exactly the same way that we require a balanced variety of healthy foods.

Unlike honey which is produced and stored in bulk long term by the bees pollen is foraged according to colony requirements and rarely stored for any length of time.

You will have guessed by now that I don’t like pollen traps or anything else for that matter that treats our honey bees like industrial machines to satisfy our ever-increasing thoughtless demands so please spare a thought for Honey bees.

Chris