Tag Archives: biodiversity

Orange tip

Posted on May 9, 2011 | 3 comments

I am of course referring to the butterfly, not an unsightly medical condition. I’ve spent plenty of time chasing them along hedgerows waiting for one to settle on a flower, but in vain, and you may recall that in a previous post I said that the orange tip was extremely difficult to photograph because they rarely settled.

That was until last weekend when, the weather was sunny, warm and calm so I went for a walk on Guns Lane to the north of Histon. I was rewarded fairly soon into my walk by a male orange tip settling on a plant on the edge of the pathway and allowing me to encroach within just a few inches:


Male orange tip. I think his underwings are exquisite, and it’s perfect camouflage when he’s perched on a cow parsley flower head.

This fellow was a good omen. Several hundred metres further along the path where the dense hedgerow thinned out into more open territory lined with cow parsley there were many male and female orange tips and they were all intent on mating on this particular morning.



Another male orange tip, this time with his wings open. And the colours on top are gorgeous too.

The female of the species doesn’t have the orange tips but is still distinctive from the other white butterflies:

Female orange tip. She is aware of the presence of males and is pointing her tail in the air in preparation for mating…

…and a few seconds later a male flew within a few centimetres and her reproductive organs are clearly visible opening up here in response to his presence.

The female above didn’t mate in this instance, but:

This pair were mating on the ground close by

And another female sits on a leaf as the male beats a post-coital retreat top right

I promised some pictures a few weeks ago of orange tips in the post ‘Local Lepidoptera’ so I was very pleased to capture this series of the mating behaviour so soon after.

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Posted in Butterflies, Countryside walks, Insects, Walks around Cambridge and Histon, Wildlife favourites

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Wildly inaccurate speculation

Posted on February 8, 2011 | Leave a comment

This is apparently what we are all guilty of if we oppose the sell-off of our forests to private investors, according to our Environment minister, Mrs Spellman. She is claiming that scare stories are being circulated such as the New Forest is to be made into a golf course and that is why we oppose the sell-off.

I don’t agree with her. The track record of this and previous administrations regarding the disposal of our national assets into the hands of people who have no right to own them has been nothing short of despicable, and has made me deeply cynical of any political claims that moves such as this are in the public interest.

It’s difficult to imagine how guarantees of public access or indeed any other guarantees will be, or can be, enforced in 10, 20 or 30 years time, regardless of promises made now. And the notion that millions of wonderful trees like the enormous horse chestnut (Aesculus hippocastanum) below, which have taken hundreds of years to evolve into mini ecosystems in their own right, will end up pulped to be made into loo paper, or even worse, The Daily Mail, is one I find profoundly upsetting


I fear we’ll lose many views like this if the forests go. What a magnificent tree!

There was mixed news on the sell-off today. The BBC were reporting that government sources had told the Politics show the plan was to be largely watered down or possibly even dropped, which is very good news if it is true. But on the other hand, the Daily Telegraph were reporting that many environmental charities will be unable to provide the financial guarantees required by the Government within the 28 day timeframe necessary to enable purchase of the forest.

This beatiful creature, a goldfinch (Carduelis carduelis), needs the trees…
…and this one too, a waxwing (Bombycilla garrulus), especially after a long and dangerous flight from north Norway

I’ve seen a document from the Forestry Commision in which the financial value of all the woodland in the east of England has been assessed. Whilst it’s depressing that everything has to be reduced to a figure on a balance sheet in order that anyone with any influence will take notice, there are some big  numbers quoted which will hopefully help people to realise the true worth of our forests to the country. Fingers crossed.

Whilst I think there are significant chunks of Forestry Commission land which have been mismanaged I think it is better that they are managing the forests for the general good. And after the current, very public, debate, if the forests are saved I hope it paves the way for more constructive dialogue on how best to maintain the forests for the benefit of all organisms that require them.

Addendum 09/02/2011

On a global level regarding forests, some good news. Golden Agri-Resources, the worlds second largest palm oil producer has teamed up with The Forest Trust, a worldwide forest conservation organisation,  to work together to find ways to prevent rainforest destruction in Indonesia. It sounds like a long uphill struggle but at least global agri-business and environmental organisations appear to be working constructively together. Long may it last.

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Our forests – update

Posted on January 29, 2011 | 2 comments

Since my post of last week about the proposed sell off of our nationally owned forests I’ve been doing  some reading to try and find out the background to the sell off. It is apparently in line with a policy document published by the government in May 2010 entitled ‘The Coalition: our programme for government‘ which sets out the stall of the current coalition (but fails to mention they plan to sell off one of our last remaining crown jewels in the form of our forests).

This is from the consultation document published by DEFRA, and in the parlance of current political imbecility:

What are the policy objectives and the intended effects? The Government is committed to shifting the balance of power from „Big Government‟ to „big society‟ and ensuring that it is intervening in forestry in England only where appropriate and necessary. Part of the policy objective is to increase profitability of commercial woodlands and reduce net costs for running local and heritage woodlands whilst at the same time increasing public benefits through greater involvement of local communities and civil society bodies. The government will seek to protect and enhance biodiversity to contribute to a network of wildlife corridors, maintain public access for recreation and leisure, ensure the continuing role of the woodlands in climate change mitigation and adaptation, and protect nationally important landscapes.

I think it significant that most of what I have read in government and Forestry Commision documents seems to stress the maximisation of profitability first and foremost before listing preservation of biodiversity and maintaining the forests for public recreation as secondary objectives. This may be my jaundiced interpretation but I can’t see how, once the forests are sold, that protecting biodiversity can be guaranteed in the long term when the primary motivation is stated to be income generation and cessation of public funding for maintenance of our forests.

As with the previous sell off of publicly owned utilities in the early 1990’s, which resulted in significant chunks of the privatised companies passing into foreign ownership, it is difficult to imagine how the same situation would not recur with our forests. A foreign logging company is unlikely to be overly concerned with maintaining biodiversity in British forests when shareholders in their own country are demanding bigger year on year dividends.

According to DEFRA’s consultation document the plan is to sell off 40,000 hectares (approximately 100,000 acres – an area equal to a third of Bedfordshire) during the period of the current spending review. In answer to a parliamentary question from Tim Farron, Lib Dem MP for Westmoreland and Lonsdale, Jim Paice, Con MP for SE Cambridgeshire and Minister for Environment, Food & Rural Affairs, replied that total income generated by the sale of 40,000 hectares of forest would be £74.5 million. It seems to me that in the economic fiasco we currently find ourselves in that is a very small amount of money indeed. The value of what we stand to lose is orders of magnitude greater.

I think it is abject folly to go down this route and once the forest is gone it is gone forever, so I hope common sense will prevail at some level of government and this piece of legislation will not be passed. If you agree and you want to add your voice to those of us who don’t want the forests to disappear into private ownership you can sign the petition to oppose this by clicking here.

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Winter garden birds

Posted on December 29, 2010 | 2 comments

The prevailing weather conditions have made me ponder what this post should be about, but a glance out the window made it immediately obvious that the numerous bird species in and around my garden would be a perfect subject. As I’ve mentioned previously, I feed the birds through the winter and as this one has been particularly prolonged and cold, and it’s still only Christmas time, my hanging and ground feeders have been kept topped up with mixed seed, niger seed, peanuts, sultanas and fat balls. There are numerous wild bird food suppliers out there and the one I prefer to use is Vine House Farm in Lincolnshire. The quality of the feed is always good and they take a proactive approach to managing their farm to encourage wildlife. Consequently the food isn’t always the cheapest but I’m happy to pay a little extra to support them.

The variety and numbers of birds visiting the gardens in my vicinity has been remarkable. Within the last week there have been numerous tits – blue tit (Cyanistes caeruleus), great tit (Parus major), coal tit (Periparus ater) and long tailed tit (Aegithalos caudatus).


Great tit male eyeing up a meal of seed on a bitterly cold morning

Long tailed tits usually appear over the space of 30 seconds or so, gorge on the fat balls and as rapidly disappear into a nearby tree. Coal tits appear on their own, take a seed and sit in the buddleia bush whilst they shell the seed and eat the contents and then usually fly away.  They occasionally stay for more than one seed, but not often. Blue tit and great tit behave quite differently, they are omnipresent and there can be up to 3 or 4 visiting  at any one time. Great tits are usually fairly nervous, they take a seed and sit at the back of the buddleia making maximum possible use of the available cover. Blue tits are much less neurotic and whereas they will take a seed and fly off to eat it, they sit in much more exposed locations. They are also happy to take on the resident robin (Erithacus rubecula). He’s a feisty little chap and he takes up position on a plant pot on the edge of the undergrowth and chases off all the other snall birds from his patch, particularly dunnock.

The resident robin guarding his territory on the flat feeder

The robin also stands on the flat feeder repelling all comers, but the blue tits have devised a technique to deal with this. They hang upside down on the edge of the feeder while the robin is on top and then flip over the top, grab a seed, and vacate quick-sharp to the buddleia bush giving the robin no time to attack.

Finches have also been conspicuous, up to half a dozen chaffinch are omnipresent in both front and rear gardens feeding on the ground. Before replenishing the flat feeder I sprinkle the remaining seed on the grass and under adjacent shrubs for chaffinch (Fringilla coelebs), dunnock (Prunella modularis), robin, wood pigeon (Columba palombus) and collared dove (Streptopelia decaocto) to graze on. There are always several chaffinch of both genders brightening things up:

Cock chaffinch resplendent in the freezing rime

Goldfinch (Carduelis carduelis) show up every day to feed on niger seed and in the last couple of days an immature greenfinch (Carduelis chloris) has appeared. Other regular visitors include blackbird (Turdus merula), dunnock, collared dove and wood pigeon which feed either on the ground or on the flat feeder and starling (Sturnus vulgaris) which gorge on the fat balls along with blue tit and long tailed tit. Less frequent visitors include wren (Troglodytes troglodytes), rook (Corvis frugilegus), carrion crow (Corvus corone), magpie (Pica pica) and pied wagtail (Motacilla alba).


Pied wagtail visiting during the coldest, snowiest, part of the recent cold snap

On several days over Christmas a flock of gulls consisting predominantly of black headed gulls (Larus ridibundus) has been swooping low over my front garden and the lawns on the other side of the road. I don’t know what’s attracting them but they’re a welcome addition to the roll of birds visiting my garden.


Black headed gull in winter plumage perched on a telegraph pole on Cottenham Road

As well as our resident birds there are lots of Scandin-avian visitors too. Opposite my house is an orchard-garden with lots of fruit trees and taller trees immediately adjacent. Since Christmas Day have been full of redwing (Turdus iliacus) and fieldfare (Turdus pilaris). It’s entertaining to watch when the fieldfare flock are feeding on fruit on the ground and someone walks along the pavement, within a couple of seconds the whole place comes alive with hundreds of birds heading for the perceived security of the taller trees.


Fieldfare heading to the orchard floor for a fruit feast

Redwing are feeding on the bright red berries of an enormous bush whose identity is unknown to me. There are many tens of them and they have been in situ for the last three days in such numbers. The pale face stripes and red patch around the leading edge of the wing are very pronounced and distinguish them from the songthrush which is similarly sized but lacks the stripes and the red patch:


Redwing – one of the sizeable flock surviving the winter in the garden opposite mine

And the other Scandinavian visitor which has descended on the UK in large numbers this winter due to the particularly dreadful weather in Norway is the waxwing. I posted on waxwing (Bombycilla garrulus) a few weeks ago after seeing them for the first time in Brimley Road, Cambridge. There have been several reports of waxwing sightings in Histon on the Cambridge Bird Club ‘What’s about’ blog in the last couple of weeks but despite keeping a look out I hadn’t seen any  myself… until yesterday. I took a walk to Narrow Close in Histon with my daughter, Sophie, where we found three waxwing in the top of a tree which were feeding on haw berries. We positioned ourselves behind a road sign and watched them for half an hour flitting between the top of the tree on one side of the road and a hawthorn hedge on the other:


Waxwing sitting in a hawthorn hedge

I think waxwing are absolutely exquisite and I’m immensely pleased they have descended on Histon, within a couple of hundred meters of my house. I planted a rowan tree in my garden three years ago to try to attract winter visitors such as waxwing but after a year or two of weak flowering and fruiting it keeled over and died. I don’t know why it failed but after a succession of very cold winters culminating in a ‘waxwing winter‘ the thought they could potentially visit is making me think I should try again. I took another walk to Narrow Close early this morning where there were 8 waxwing feeding on haw berries in adjacent hedgerows.


Another waxwing harvesting haw berries

A green woodpecker (Picus viridis), sparrowhawk (Accipiter nisus) and grey heron (Ardea cinerea) have also passed overhead in the last two weeks. The best thing about the wintry weather is the abundance of wildlife that can be seen by simply putting food out on a regular basis. Most of the photographs in this post were taken in my back garden, and all of them are within 200m of home.

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The Waxwing

Posted on December 3, 2010 | 2 comments

At this time of year a look at the ‘What’s About‘ blog page of the Cambridgeshire Bird Club (CBC) website to see if there are any interesting avian visitors in the locale is well worth while. On Monday this week (29th November 2010) there was a posting on the CBC site recording a sighting of waxwing in Brimley Road, Arbury, north Cambridge. They were spotted feeding on the berries of the many rowan trees in this street. Having never seen a waxwing and having marvelled at the spectacular pictures I’d seen of them I went there at lunchtime to have a look for myself. Alas, there were no waxwing to be seen but I persevered and went there again on Wednesday lunchtime with my friend and fellow wildlife enthusiast, Joe. Again to no avail. So we decided to make an early morning trip on Thursday, reasoning that the waxwing would be more likely to be there at breakfast time.

Thursday morning was snowy and absolutely freezing cold but I set off at 7.45 with my camera. On this occasion it was third time lucky:

Five of the seven waxwing frequenting Brimley
 Road last Thursday

The trip was definitely worthwhile! It was a murky, grey, cold morning and until I got within around 30m of the birds I thought they were starlings. But as I got closer the crest became evident and then the colours… and they were absolutely stunning. A blaze of colour brightening up an otherwise grim morning.

The scientific name for waxwing is ‘Bombycilla garrulus‘ which means ‘chattering silk tail’. They are predominantly resident in conifer forests in Scandinavia and are partial winter migrants to the UK. I.e. some of the population head south in winter – known as an ‘irruption‘ – when food supplies in the north which consist of a variety of fruit and berries including crab apple, rowan, cotoneaster and mistletoe, are insufficient to support the whole population. An article in todays edition of the ‘Chronicle and Echo‘, the local newpaper in Northampton, reported that that current weather conditions in Scandinavia are really atrocious so record numbers of waxwing are migrating south giving rise to a ‘waxwing winter‘.

Waxwing feed in flocks, perching in the top of a tree and making occasional forays en masse to nearby fruit trees where they go into a ‘feeding frenzy’ for a few minutes before returning to their perch. This behaviour was observed on Brimley Road, the 7 birds there were sitting in the top of a crab apple tree and moving to an adjacent tree which looked like a rowan with white berries, to feed. There are species of rowan from China which have white berries so I guess this tree was a Chinese variety. We watched them for approximately 45 minutes during which time they appeared almost completely unfazed by our presence or the constant hubbub prevailing in a suburban street just before the school bell.

They are approximately the size of starling and at a distance can be mistaken for starling, as I did. They are 18cm long with a 34cm wingspan and they make a call like someone quietly ringing a small porcelain bell. There are up to approximately 200,000 pairs in Europe and it’s conservation status is green.

I don’t normally go twitching, especially in places as public as this, and I thought people would think we were a tad bonkers. But it was a pleasant surprise how many people stopped to ask us what we were looking at and showed a real interest in the birds. One chap even stopped his van in the middle of the road for a chat, only moving when the traffic behind honked the horn.

A great way to spend an hour before work, despite the freezing weather!

 

 

 

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Guns Lane

Posted on November 26, 2010 | Leave a comment

As I mentioned in my previous post, Guns Lane links the north of Histon with Willingham and Ely, and provided the raw materials for my winter warmer, sloe gin. Due to the profusion of heavily laden trees and bushes – hawthorn, dog rose etc., providing food and cover for the resident wildlife, it is a great place to go birdspotting too.

My first stroll up there this winter was three weekends ago, 13th November 2010) and the profusion of birdlife on display was spectacular. Shortly after entering Guns Lane from Cottenham Road under a copse of tall trees several chaffinch were flitting around at the top. Closer inspection revealed the sumptuous pink breast and black cap of a cock bullfinch who exited the tree accompanied by three others. That was only the second time I’ve seen more than one bullfinch since I was at school. And the first time was the weekend before in Girton. Bullfinch feed on the buds of fruit trees in springtime and have been accredited with decimating fruit crops and I believe it is still legal to trap them in some parts of the UK. Consequently, their numbers dropped dramatically in recent decades so it’s great to see them in threes and fours.

Further on a wren appeared at around eye height craning on a tall grass stem to see me. It didn’t appear overly perturbed by my presence and followed me along the path for 30-40m. Simultaneously, several goldfinch were patrolling the top of the hawthorn trees on the other side of the lane until a visit by a kestrel frightened all the smaller birds away.

N.b. You can find full list of my sightings by clicking on this link to my wildlife diary.

All along the walk numerous small birds such as blue tit, great tit, a flock of long tailed tits, chaffinch and goldfinch appeared and redwing and large flocks of fieldfare are now regular fixtures.


Looking north along Guns Lane on the edge of Histon. These bushes are a hotspot for blue tit, great tit, long tailed tit and magpie

On another walk there had been very little birdlife to see until approaching a bend a little further on from the spot in the photo above, there was a commotion going on which I thought was due to my presence. As I approached blue tit, chaffinch, blackbird and even a green woodpecker took to the air all alarm calling and as I rounded the bend a buzzard emerged from a bush close by and glided up the lane away from me for 50-60m before turning off into a field. That all happened within 30 feet of where I stood and I don’t often get to see a buzzard that close – all very exciting!

Blue tit feeding in a bush on Guns Lane
Fieldfare – this one was difficult to photograph due to the position in the top of a tree and the bright white sky behind – I aim to get some better pictures as soon as possible!

Adjoining the lane at the Histon end of the lane is a field of scrub, which I call Church Field, and is always full of birds, with regular sightings of green woodpecker, chaffinch, greenfinch, latterly bullfinch, kestrel and the occasional sparrowhawk, among various others.


Looking north east across Church Field – it’s a good mixture of old established trees, young scrub and grass

The weather this weekend past (27th and 28th November 2010) was freezing:

and during an early morning foray into Church Field last Sunday (28th November 2010) a kestrel was perched on the uppermost branch of a tree with his feathers ruffled as protection against the cold:

Male kestrel trying to stay warm on a fiercely cold morning

It’s unusual to be able to get close and take photographs of most birds including birds of prey, so I was very grateful to this one for sitting tight for so long. He kept a watchful eye on me as I slowly sidled round the bottom of his tree which gave me time to capture a few decent shots. I particularly like this one looking down the lens with his feathers all ruffled up. On my way back through the field a couple of hours later a cock bullfinch flew right over my head, his colours against the bright blue sky were vibrant.

The section of the lane approaching the Oakington to Cottenham road is different habitat consisting of old, thick hedgerows which are frequented by big flocks of fieldfare and flat open fields which this weekend were hosting small flocks of lapwing (~20) and larger flocks of golden plover (at least 40) in the midst of which a heron landed and sat catching its breath until after I was out of sight. The hedges bordering the fields here are also home to many small birds such as chaffinch, goldfinch and dunnock.


Part of a small flock of 22 lapwing in a field off Guns Lane

And part of a larger flock of golden plover

The end of a walk on Gun Lane can also be the best part and I usually linger right by the Cottenham Road end where trees overhang the lane on both sides. These trees and bushes are usually full of birds including blackbird, chaffinch, blue tit, great tit, coal tit, house sparrow, dunnock, goldfinch and sometimes they’re all on parade at the same time.


House sparrow male in a hawthorn tree at the Cottenham Road end of the lane

And this brave squirrel sat watching me as I was photographing the birds

As you can hopefully see, this is a really good place to go for a stroll and see lots of really good wildlife. All the pictures and observations in this post were collected in just three walks. I’ll post again soon to tell you about my next outings on Guns Lane.

 

 

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