Beavers in England

Recently I posted an essay on the reintroduction of Beavers into Scotland. While trying to access the data learnt about the impacts upon the environment of this, I learnt that in England for the last two and half years there have been Beavers living here. While they have been fenced in, the sixteen European Beavers from Bavaria, so like our Royal family they are German, have been living happily and without damaging the environment. In fact the improvements the Beavers made to the habitat has provided homes and habitat for thirty other endangered species. This was all unexpected.

Any reintroduction programme always faces opposition from some groups, therefore this test site was used so that we could learn what the impact would be upon the environment and more importantly the biodiversity. Thus on a five hundred and fifty acre fenced in site, the beavers were released.

As beavers will do they adjusted the landscape to provide themselves with the pools and lodges they need to live. The first aspect of their natural behaviour that was noted was by cutting down the trees around the pools on the site, it regenerated the vegetation. Wild flower seeds in the seed bank spontaneously germinated. Some were plants that were thought lost to the site, and this had the additional effect of enabling invertebrates to come in and the population of water voles, a species in serious decline in the UK, started to increase. There were also unexpected benefits for fish as the Beaver lagoons created habitat that allowed fish to breed.

The aspect that really surprised everyone involved was that during flood events, the way that these mammals had managed the watercourse greatly slowed the flow of water helping to lessen the effects of the flooding.

While I dare say there will be people that are still not convinced by the wisdom of reintroducing these animals, all I have seen thus far is a genuine win win situation. I am hoping that I will be able to take up the invitation to go and visit the site myself and get my own view of an English Beaver.

Biodiversity Week in Scotland

Here's an interesting little gem, in Scotland, Natural Heritage Scotland have declared this week Biodiversity week. So will that mean more Midges? Anyone who has been to Scotland will know that you offer yourself as a sacrifice to these blood suckers! Not that I am trying to put people off visiting this beautiful place, but even I get bitten to death there. But seriously, Scottish wildlife is fantastic. Recently I was listening to a programme on the radio where the presenter was on one of the Scottish Isles and was watching a pair of white tailed Sea Eagles from a hide when not one but three Golden Eagles came into view and she could see five magnificent raptors in the sky at once. To say that I was jealous would be an understatement.

Here in the UK we do have some fantastic wildlife.

A link to the Web Site

Beaver Reintroductions in the UK

Back in the autumn I talked about the possibility of Beavers being reintroduced into the British ecosystem. This triggered by the BBC showing images of beavers on the Autumn watch programme. Following that I started looking at the effects of reintroductions.

It is important to distinguish between introductions, a species that is not native but is introduced either deliberately or accidentally, and generally damages the environment and eco systems. Where as a reintroduction is a species that used to be a part of the ecology but has disappeared for some reason, and is reintroduced to rebalance habitat. Locally red Kites were reintroduced as an example, and are thriving. As I write, I can see a Red Kite to the north of my Village out of my window. The impact of them back in the environment is having a real benefit. As they are predominantly carrion feeders, the Kites are removing items that previously had been attracting rats and it seems that having the kites is helping to reduce the numbers of these vermin.

Therefore, reintroductions do create a positive impact for the environment. In the case of the Red Kite it has been an unexpected reduction in the numbers of rats, as well as providing a boost to the economy via tourism. For example there is one particular pub where it’s possible to sit in the beer garden and watch these magnificent birds.

However, it is the benefits to the eco system that is most amazing. In Yellowstone National Park in America, the reintroduction of the wolf aided the habitat, and in surprising ways. One of the effects was that Aspen trees and the willows started to regenerate. This was because the wolf is the top predator and the numbers were sufficient to affect the behaviour of the Elk who were browsing on the shoots of the trees. By the wolfs being their the Elk were keeping to the open and the hills where they could observe the wolfs. That was stopping the Elk from constantly nibbling off the shoots from the trees thus allowing the trees to regenerate. Further, this benefits animals like Beavers who rely on the willow for food. Additionally, the extra ground is benefiting a whole range of other species too.

It has always been known that the presence of top predators is a good indicator of a healthy habitat. But what is a new discovery here is that just how important they are to the health of the whole chain of life in a biosphere.

With the plan to reintroduce Beavers in Scotland there will be great benefits too. At the moment conservation organisations have to invest a lot of time and money in coppicing trees at the waters edge, this the beavers will do naturally for food and to build their homes. Further, in places like Germany where they have already been reintroduced the Beavers have seriously knocked back invasive species like Himalayan Balsam that is choking out native species of plant life. Therefore, I cannot see any disadvantages to this reintroduction programme.

In addition to this reintroduction, I also understand that on another Scottish Estate a breeding pair of Elk have been reintroduced as part of a long term plan that could see another colony of Beavers reintroduced along with Wolf and Lynx. While I personally feel that this would benefit the environment, I can see objections to this and careful preparation work would need to be done, especially education. So I watch and wait.

Welcome to the Grass Snake Hotel

With any conservation project the amount of work that can be completed is directly proportional to the hard work and dedication of the volunteers. The building of one Snake Hibernacula was ambitious to build two was going to be difficult but achievable. Therefore in planning what work was needed to be done, two days were allocated to this project.

One of the greatest difficulties was always likely to be that the ground where the pits needed to be dug. As this is a woodland area, that meant digging through tree roots, and anyone who has done any gardening near trees, will know, this is never easy. However, we are blessed with a light sandy soil down by the river, therefore digging would not be as bad as it could be. Thus a balance was there and fortunately on the day the unseasonably good weather held up making the work easier to carry out. While it was still hard work as more than one tonne of soil had to be dug out of each pit, the pits were quickly created.

The pits are made two meters by two meters and about forty centimetres deep, with a slope to wards the south. That way they can drain and will stop them becoming frost pockets. These pits are then filled with logs that are at least twenty centimetres across and laid crossways on two layers. This creates an area of air that is warmer than the ambient air temperature, and even if this log filled pit becomes water logged, that water will not lead to the air within the hibernacula freezing, therefore not harming or killing the snakes inside.



Those logs bring the pit back up to the ground level; at this point the actual accommodation is constructed. This is made up of smaller branches, from ten centimetres down to twigs, stacked so they are in an east west orientation. The orientation again is important so that at sunrise in particular, and less so at sunset, the sun warms the branches at the entrances so that the air temperature is kept higher than the ambient air temperature and frost-free. This stack is built up so that its about eighty centimetres from the ground. All the spaces in this pile are there so that the snakes can find cosy places to sleep out the winter free from predation or disturbance.




Then an insulation layer is put on the logs. While turf would be ideal, as Chopwell wood doesn’t have great swathes of grass anywhere, we used bracken something we do have lots of. Often it is a matter of making minor adjustments and using the materials available, rather than not doing something because you don’t have what’s ideal. Therefore with the logs insulated the soil from the pits is used to cover the hibernacula, leaving the East and West sides open.



The volunteers worked their socks off, and two hibernaculums were completed in a day rather than the two days expected. Friends of Chopwell Wood, and the Durham Biodiversity Action, were really lucky to have had such hardworking and dedicated volunteers. Thanks folks, and I am sure that the Grass snakes will send their thanks too.

All we need to do now is find the tenants!
So to all you grass snakes out there, free accommodation.
(We don’t mind if the Grass Snakes are Squatters either)
Beautiful Location

Enhancing Biodiversity

This weekend the Mouse is going to be busy helping to build not one, but two, Grass Snake Hibernacula in the wood. While climate change may be bringing new species further north, we are at the northern limit of the normal range for Grass Snakes. Unfortunately there has been a decline in the population in recent years due mainly to a loss of habitat. All those overly tidy gardens, spraying of herbicide and modern agricultural practices have all contributed to this. However along the Derwent River, there is an opportunity to reverse this decline by enhancing the habitat for the Grass snake.

Many of the elements are already there including the snakes, it is just a matter of managing the area so that it enables these reptiles to maintain a strong belly hold.

The area that the Grass Snake hotels are to be built in has already had some coppicing work done, this opens the area up to the sunlight and will provide the basking areas the snakes need so that they can raise there temperatures, being cold blooded this is vital to their survival. The fact that the area where the Hibernacula are to be constructed is an area that has to be coppiced regularly is all part of the careful planning and long term viability of the project. Further, because of the need to create piles of composting vegetation so that the snakes can breed and nest, also helps deal with another problem of the highly invasive Himalayan Balsam. This introduced species has created a large colony that has been smothering out all other plants. By utilising these plants as the material to create the compost heaps has the effect of benefiting the Grass Snakes as well as dealing with the invader.

Therefore, while this work will directly benefit the Grass Snakes, it will also help the native plants to re-establish themselves and benefit many other forms of Fauna and Flora too.

It will not be until next year that we will know if there are any snakes using the hotel, but there are snakes in the area, not just grass snakes but the even more endangered adder as well. All this work could benefit tens of species in the long term, enhancing the ecology of the wood and the river Derwent.



There was an article in the local paper today about the project too, and I understand that local TV will be covering it as well. Fortunately the mouse was in hibernation for this.

Mass Extinction and Climate Change

When I saw the headline of this story on the BBC web site, I thought this is not news, the IPCC (International Panel on Climate Change) have already reported that we will have up to a forty percent loss of species as a direct result of this man made pollution we call climate change. However, this research is new and marks an important change in the attitude of scientists. Previously the language used “Hedged the Bets” and spoke of what was theoretically possible rather than what was actually happening.

Part of the problem in dealing with the man made pollution that is climate change, is a psychological one. In the past we have seen pollution as localised, and no matter how bad it got, when action was finally taken, the environment improved and the problem dissipated. Even with acid rain as that was a regional problem, in Europe for example, when Europeans acted collectively the situation reversed. And while there still is some sulphur pollution that is causing acid rain, it is relatively negligible.

With Climate Change, we can not see (or at least some can) that there is anything we can do, as we psychologically assume that there is no point as China or India or what ever other country we want to use as an excuse, are not doing the same. What is needed is leadership, and that should be coming from America and Europe. As the USA is the biggest polluter, producing 24 tonnes of CO2 per head of population they should be taking the lead here.

But the problem is that everyone is hoping for that technological fix, that mythical grail of pollution free energy. As a planet we have squandered our energy resources. We have allowed a culture that is so reliant upon oil to develop that we are prepared to fight wars for access to it, and allowed our whole way of life to become dominated by the automobile. The problem is that to power our way of life we are burning billions of tonnes of oil and releasing all the carbon dioxide that the planet sequestrated away back into the atmosphere.

What this new research shows is that while climate change has naturally occurred in the past, and effected the biodiversity of our planet, our current man made driven warming of the globe could wipe out most of the life on our home world. That as I am sick of having to point out includes us.

If we lost important pollinators like bees how long would we last? That’s not a rhetorical question, but fortunately minds far better than mine have already done the research and tell us that we would last only six years. We would loose our ability to grow over ninety percent of our food. That is what mass extinction will do to us.

Even now when there are clear signs of the effects of Climate Change in the forest fires in California, we still do nothing. Unless we act now, if we survive, we will become the most hated generation of humans within our children’s history.

The BBC Article

The UK Biodiversity Action Plan

Today I have been doing a little light reading, the new Biodiversity action plan. This is a plan drawn up by a committee, for government, to highlight the species that are under threat in the UK.

What is most interesting, almost alarming that since the first one was drawn up ten years or so ago, the list has doubled in size, from over five hundred species to over one thousand. Yet while there is reason to be concerned, locally we do seem to have healthy populations of some of the animals listed.

Just yesterday I was able to share one of the pictures of a common frog taken yesterday, yet this amphibian is on the new list. Also listed are many species that I have seen myself in the local environment.

It will take me some time to read and absorb all the details, but one thing that makes me feel positive with what is happening locally, is that many of the planed projects in the wood, and in other places are being done specifically to help much of the Flora and Fauna that has appeared on the new list.

While that doesn’t mean we can be complacent, it does mean that the efforts of so many people are really important for the health of our countryside.

The picture is of a Diamond-back Moth plutella xylostella I don’t think its on the list but it just happened to turn up the other day and I was able to get this picture. What is remarkable is that it is only six or seven millimetres long.

Dealing with damage and creating something special

While I am a strong believer in allowing open access to the countryside, I also realise that there are some people who don’t care about the environment and come into the natural environment set on causing damage. The photograph of this damaged tree is just one example of the damage that irresponsible people do.

Today, the Mouse and the Chair had to complete the cementing in of the rocks in the Coal Tubs. This was becoming urgent as already the mindless ones were trying to destroy the work already done. Some of the content of the tubs, not concreted in, had been removed and the rocks used as projectiles to attempt to damage the tubs and the work already done.

It would be all to easy to become despondent, but with a pragmatic attitude, we worked to complete the task and ensure that there is little that can be damaged. I personally have never understood the drive or motivation to destroy. I suppose that because it’s easier to destroy something than to create, it must provide the brainless some form of creative outlet.

With that task completed we only need to get our willing band of volunteers to join us to paint the tubs now. You are welcome to join us.

That done, the Chair and myself were not finished as we also had the job of dealing with the wildflower meadow.

As the British landscape is an artificial one, created by thousands of years of human intervention, the traditional wildflower meadow is a habitat that requires careful management. In the past, meadows would have been clearings created when trees were felled to provide hay and herbage for animals and livestock. Because there was no active inputs into the soil from manure, as would happen in a pasture meadow, and the grass and herbage are removed, the soil remains poor and denuded of nutrients. This makes the land poor for growing crops, but a perfect environment for the wild flowers, as the grasses are not able to take over.

Thus with the changes that have occurred in agricultural practice over the last fifty to sixty years, many of the traditional wildflowers have become scarce. By recreating a wildflower meadow, we ensure that the flowers exist as well as the insects and the reptiles and amphibians that feed on the insects. While the biodiversity is much grater than just that, it gives you an example of why these areas are so important.

But, as people no longer keep the odd pig, or a house cow, or even a goat or two, traditional meadows are no longer a part of the agricultural necessity. Thus managing them becomes more labour intensive. Thus the work falls to us volunteers to do the work.

Fortunately, the Friends’ have some good contacts and supporters and we got the woman who has the Alpacas in to cut the hay. But the real work is raking up and removing the hay. That is what the Mouse and the Chair did today.

The benefits to the wildlife were obvious right from the start as there were several common frogs Rana temporaria in the area and as the herbage was raked up they were hopping away to find cover. Also as the ground was cleared a large number of vole and mouse holes were revealed too.

While all of this was hard work, the benefits to the natural environment were obvious and while it is harder to create something worthwhile, that effort is justified.