DofB on Youtube

Short youtube piece on NT reintroduction in Bradenham Valley, S Chilterns, starring His Grace the Duke of Burgundy   http://www.youtube.com/watch?v=oJ7cIBSJ8vc

Still Beating Skippers

All followers of His Grace will have enjoyed watching his attacks on Dingy and Grizzled Skippers on many occasions. However, it is far less often that we are afforded the privilege of watching him beat up the Large Skipper; in fact I only recall ever seeing this once before.

Yesterday (26th June), while surveying a site on the Downs at Storrington, I was only mildly surprised by the relative abundance of spring skippers still flying, bearing in mind how late this season is still running. I even saw Green Hairstreaks, although they weren't very green. What did surprise me was this feisty old Duke who, despite visibly falling to pieces, was attacking every one of the freshly emerged Large Skippers that crossed his territory. This butterfly wins my 'Duke of Burgundy of the Year Award'.

Old Soldier

This afternoon I stopped off at Springhead Hill near Storrington, primarily to see how the Small Blue is faring. Numbers are much better than last year and females are still emerging, with two mating pairs seen.

What did surprise me, particularly so late in the day, was this geriatric male Duke, still taking on anything that crossed its airspace. The same individual was photographed a week ago, already looking bleached and well past its sell-by date. I'm pretty sure this is the same male I first saw eleven days prior to that, making it at least 2.5 weeks old. Good effort!

Farewell To The Duke

Yesterday (8th June) I performed my final 2013 count of Sussex Duke of Burgundy. For the ninth season in succession I have spent a great many hours surveying, monitoring and studying this species and, as in previous years, I would like to think that I have learned a little more about it. With 417 sightings logged, I'm pleased to report that on all Sussex sites His Grace survived the worst that the British weather could throw at him in 2012. Perhaps the best news of all is that the sun has shone brightly for more than two weeks, allowing the females an almost uninterrupted opportunity to lay eggs. 2014 could be a good year for the Duke.

Fantastic Day


Not the best picture in the world I know but representative of the fact that I found Dukes virtually every step of the way today - this is at the top of Butser Hill in Hampshire 270m amsl in a howling gale! 
As the season appears to be drawing to a close I thought I would spend a few hours walking all of the likely areas at Butser. When I turned up there was a strong cold north easterly wind blowing and although the sun was out it was cool. I headed down on to little Butser and was soon assured I had made the right decision spotting two males basking. I must have walked several miles along the entire scrub line around the north and west faces aventually scaling the humorously titled Grandfathers Bottom, which to use Neil's phrase is serious mountain goat territory - it rises 120m in 100m - seriously steep. In all I encountered no less than 68 Dukes in just under three hours ( which is conservative as I only counted definites - could have been  90+) some were still moderately fresh, others were very worn,  and the one pictured which was the last at the top of my climb. I even encountered eight males all defending a nettle patch no less and a battle between a duke, brown argus, grizzled skipper, common blue, green hairstreak and a small heath - the duke win hands down.
In all I don't think I went more than 100m without encountering a Duke which is credit to the park authority who have created some great habitat - bodes well for next year as they have had the best of weather for laying.
Mark 

Making Hay ...

The spell of warm, sunny weather we have enjoyed through late May and early June is fantastic news for some of our rarer spring species. Duke of Burgundy, Pearl-bordered Fritillary and Wood White will all have had the opportunity to spend long periods out egg laying. As long as we don't see a summer drought, I'm optimistic that the numbers of these and other species will bounce back strongly next spring.


Although most Duke populations in Sussex peaked a week or more ago, the later sites on cool NW facing slopes are still producing freshly hatched females. Yesterday I counted 46 Dukes over three adjacent sites, including two mating pairs and a couple of females with only very minor wear & tear. Let's hope the egging continues for another week or more.

Sussex from Hampshire

To  compliment Neil's photo of Hampshire from Sussex here is the reverse also taken yesterday, Harting Down is in the centre - Neil might even be there! Taken from Little Butser.
Journeyed right across Hampshire yesterday visiting Dean Hill on the Wltshire border, Bentley Wood then some sites around Winchester finishing at Ramsdean Down. Pleased to say that I only failed to see Dukes at Bentley Wood , but plenty of Pearl Bordered Fritillaries  made up for that. 
I manged to see them in three locations where I had not seen them previously seeing 25 in total. Dingy Skippers are now beginning to predominate but I did see a few pretty fresh Dukes. 
Mark.

Dukes On The Wane

Sadly, the Duke of Burgundy season is now on the wane and my 2013 survey of all Sussex sites will probably be complete by the end of next week. However, there are still some highlights to be enjoyed, such as the count of 9 males at Harting Down this morning (31st May); none were seen here last year. This site is mountain goat territory, and very seldom visited by anyone else, so it's a great place to escape from the crowds and just melt into the landscape. The views across the West Sussex/Hampshire border are spectacular; this morning they were enjoyed to the soundtrack of skylarks and a distant cuckoo.


After a disappointing count (2) at a private site, I headed to Heyshott Escarpment, where once again I was alone with the Dukes. Although I managed a healthy count of 18, including the beautiful female pictured, the numbers are now dropping off. The Duke is no longer the most common species on the slopes, overhauled by both Dingy Skipper (37) and Small Heath (46). The latter seems set for a good season. Other species included Pearl-bordered Fritillary (1), Green Hairstreak (3) and Grizzled Skipper (3). If you haven't had your fill of Dukes yet, get out there this weekend.

Duke of Burgundy Reintroduced to Bradenham Valley

In the spring of 2011 the NT, in liaison with Butterfly Conservation and Natural England, carried out an officially-approved reintroduction of His Grace the Duke of Burgundy to two small and almost-adjacent chalk grassland sites in the Bradenham Valley, west of High Wycombe in the Chilterns.  The butterfly had died out there circa 2000.  Fortunately, the reasons behind the extinction have been identified and addressed, and habitat conditions have improved greatly.  The two sites support other invertebrates with similar requirements to His Grace, notably Small Blue and Dark-green Fritillary butterflies and the rare bee-mimic hoverfly Microdon devius.

The chances of natural recolonisation were deemed extremely slim, though there is a small colony, the last in the south Chilterns, along a railway line over 2km away.  This is isolated from a developing matrix of chalk grassland habitat patches in the Bradenham valley by intensive agriculture.  The butterfly has declined drastically in the Chilterns during the last 20 years.

In late May 2010 91 eggs were harvested from the Ivinghoe Hills (NT) further north in the Chilterns.  These were bred through in captivity by Ched George of BC Upper Thames Branch.  From these, 29 adults were released at Small Dean Bank and 25 at Park Wood in the spring of 2011.

Close monitoring, mainly by Ched, revealed a reasonable colony at Small Dean Bank in 2012.  The peak count there was 14 (3 females, 11 males) but only a maximum of 2 was recorded at Park Wood. 

On Mon May 27th this year, in windy weather which hinders this butterfly considerably, 3 males and 1 egg-laying female were counted at Small Dean and a max of 4 males and 1 female at Park Wood.  We undoubtedly under-recorded due to the windy conditions, and would probably have seen twice as many had we visited in calm sunny weather.  At least three of the adults seen were freshly emerged, and it is likely that a few more adults are due to emerge.  Habitat conditions have improved further.  Hopefully enough eggs will be laid during this poor spring to see the butterfly through into next year. 

Gaining official approval necessitated 4500 words of reports and letters, plus some emails and phone calls.  Both donor and receptor sites are SSSIs, so double approval had to be obtained from Natural England.  Internally, all wildlife releases and extirpations have to be approved by the NT's Natural Environment Panel.  This required me to write a 1500 word report and attend a Panel meeting.  The Panel approved the release but expressed some concern as to the long term future of the butterfly in the Chilterns under a climate change scenario - the Chilterns may become too drought-prone for a butterfly whose larvae depend on Primula leaves that remain green well into the summer.  The Panel was, though, impressed by the Trust's vision for recreating chalk grassland in the Bradenham Valley (where several areas are being restored to downland from agriculture or forestry).  Hopefully the butterfly will 'take' properly at Small Dean and Park Wood, and then spread to other places within the Bradenham Valley.  The butterfly needs some decent weather though, and cannot have laid many eggs yet this season....


Small Dean Bank

His Grace, at Park Wood

Hampshire Dukes

Got out really early today and didn't get home  until 7pm! Made the most of the weather.... First call was magdalen hill down and it was pretty quiet as I was early but saw good numbers of green hairstreaks  including six doing battle when two holly blues joined in - mayhem. Then went over to St Catherine's hill and was a bit disappointed  - no downland species at all but good counts of peacock brimstone and orange tip.
I then visited an adjacent site I had been told about to check it  for dukes. At first it did not  seem very appealing with waste height nettles which caused some grief but I persevered and eventually found good numbers including a mating pair - this was a new site for me so very pleasing.
This site is 'open access land' and there seems to be some scrub clearance but little grazing. The Dukes were spread along several hundred meters of the lower part of the hill so potentially great site with some careful management but I dont know who is responsible fir managing it?
I then ventured to Beacon hill in th Meon Valley again to search for Dukes but with only one tentative siting it was a bit disappointing but again very good numbers of GH.
Then across the valley to Old Winchester Hill very few butterflies around but managed to locate the small colony of Dukes spotting five in total including two females.
There was just time to finish in my favourite spot in Rake Bottom where again saw a few Dukes settling in for the evening - fantastic day seeing Dukes at three different sites  Mark

Counting Dukes


The last two days (25th & 26th May) have been pretty typical for me at this time of the year, involving a mad dash to try and survey all of the Sussex Duke of Burgundy sites as thoroughly as possible. Although numbers will take another season to recover, there does at least seem to be a viable population remaining in the areas I've visited so far; sometimes only just. That's quite a relief after last year's weather, but I do have doubts that the national tally will remain unaffected by the 2012 washout. I recorded 55 Dukes over 6 different sites and on some of these the butterfly is still emerging. Along the way I'm seeing reasonable numbers of Dingy Skipper and Green Hairstreak, although the Grizzled Skipper isn't faring quite so well. While searching an area of Rewell Wood today I saw 7 or 8 Drab Looper moths, so they seem to have weathered the storm quite well. These frail looking insects are a lot tougher than we give them credit for.

Dukes Launch 'Save Our Butterflies Week' In Sussex

I'm pleased to say we were blessed with decent weather and a good turn-out of both people and butterflies for the BC 'Save Our Butterflies Week' launch event in Sussex, held at Heyshott Escarpment on Saturday 18th May.

On the walk itself we saw 20 - 30 Duke of Burgundy without straying from the footpaths. I later returned to scour the site and counted 42, including 3 females. I estimate they are still a week to ten days from peak here.

Perhaps the biggest surprise was the discovery that Pearl-bordered Fritillary has moved onto the site. I was gobsmacked to see a male during the walk, and even more surprised to later watch a female PBF make her first, unsteady flight. They used to occur along the Downs here in the C21st, so this might signal a welcome return. It's 11.5 Km to Rewell Wood, where the species thrives, so I suspect they've been hiding out in Charlton Forest, just over the ridge from Heyshott.

45 Years On, and counting...

In 1968, when the world was young and heady, the 19th of May fell on a Sunday, as has been the case this year.  Spring that year was slow, but sure, and gave the impression that sooner or later something mighty was going to erupt within the world of Nature.  It did, on May 19th. 

But May 19th 1968 began with school chapel, which dragged on till 10am.  It was, of course, compulsory at boarding schools in that era – on pain of severe pain.   Between chapel, and the equally compulsory but utterly inedible Sunday lunch, was an opportunity of less than three hours to go butterflying.  Consequently, I ran, in heavy school shoes, dressed as a penguin in full school uniform, the two and a half miles to Marlpost Wood.  I entered the wood at the zenith of spring, with the heady scent of bluebells in the air, stuffed my school coat under a bush – and crossed rapturously into a new dimension, the real world.

There, to an eternal delight that must now be shared, I saw my first Pearl-bordered Fritillaries and what was then known as the Duke of Burgundy Fritillary.  It must be confessed that I still refer to the latter as the Duke of Burgundy Fritillary at every opportunity, for butterfly enthusiasts fall for the names they first learnt – and, as Aslan himself put it: ‘Once a king and queen in Narnia, always a king and queen in Narnia’.  The Pearl-bordered was undoubtedly the most beautiful thing I had seen in fourteen years of life, on account not merely of the juxtaposition of colours, but of the grace with which it flies.  The magic is compounded by its affinity with the exquisite blue of its beloved bugle flowers.  The Burgundy was evidently a living jewel, and a butterfly of strong character. 

Both butterflies occurred around a few acres of young plantation, where rows of oaks had been inter-planted with lines of Norway spruce, as a nurse crop, next to a broad sunny ride bedecked with clumps of bugle and stitchwort.  Speckled yellow moths were hatching, and flopping around amongst bracken fronds old and new, fair weather cumulous clouds were drifting lazily above, for atmospheric pressure was rising, and a distant nightingale sang snatches of some Elysian song.  Will people who do not believe that Paradise exists upon this earth kindly revise their views: it does, only it tends to be transitory and intensely episodic, and you have to be in the right place at the right time.  Moreover, human nonsense, such as compulsory chapel, is forever getting in the way of it. 

A horribly soppy and na├»ve song by a group called The Honeybus, who mercifully had only the one hit, was riding high in the charts in May 1968, and was in my mind throughout and beyond that visit.  Years later I rewrote I Can't Let Maggie Go, slowed it down and removed the annoying falsetto parts, and attempted to give it some decent lyrics.  This heavily revised, near-paganised and unrecognisable version is my song of the Pearl-bordered Fritillary, but like so much of what one holds dearest is inappropriate for open communication.  We dare not come out at that level, I know not why. 

After an hour and a half in Paradise I ran back to school, in time for the compulsory lunch.  But I had left something behind in the woods, part of me.  Instead, I had taken something with me, not merely a couple of specimens of each species, which I set that afternoon, for people collect memories and forge relationships with places.  Marlpost Wood has changed unrecognisably since that day (most of it blew down in the Great Storm of October 1986), and so have I.  But we remain intertwined, and her Duke of Burgundy and Pearl-bordered fritillaries dwell still within me, not merely within my mind, or my imagination, but within my soul.

Suffice it that 45 years on, to the very hour, I rekindled first my relationship with His Grace the Duke of Burgundy Fritillary and then with the Pearl-bordered Fritillary.  The only significant difference was that Sunday May 19th 2013 was Pentecost Sunday (when the churches celebrate the coming of the Holy Spirit to the Disciples).  

I spent a pleasant afternoon in welcome sunshine walking across  the ' north face' of Butser Hill in Hampshire. From little Butser I could see Neil's domain in Sussex.  Despite there being some good habitat on Little Butser  and on Ramsdean down I did not locate any dukes but I will be back to check again.
However the story was different at Rake Bottom where I came across at least sixteen individuals with at least a couple of females. This is much more like the numbers I would expect to see in early may - hopefully they have caught up.
There seems to be two colonies here the largest in pristine habitat and the other smaller one in an area heavily grazed by rabbits,  having seen some of the areas available at Ramsdean it is a bit perplexing why they haven't been occupied yet.

His Grace Takes to the Air

The BBC Natural History Unit will be filming His Grace the Duke of Burgundy at Rodborough Common, Stroud, this Friday, May 17th, for a forthcoming Springwatch Special on British butterflies and moths.  We hope to be filming at Manor Combe and on Swellshill Bank.  Apologies in advance if we hog the place... .  Strangely, it looks as though this butterfly hasn't appeared on mainstream TV before.

I particularly want the piece to cover the love life of this little butterfly (he doesn't even ask her name, let alone speak to her father, propose on bended knee and get the banns read out in church.  In fact, no one would want their daughter to associate with a bloke with the morals of a male Duke of Burgundy).

Hampshire doings

I paid a visit to several areas around Butser Hill near Petersfield today and butterflies were very few and far between. Having explored some new areas that look very promising and found no dukes, it was very windy, I walked over the hill  to rake bottom where I had bumped into Matthew last week. The weather was deteriorating but I manged to track down just one male in a shetered hollow. Taking the opportunity to sit and watch with my binoculars for the next two hours i picked up some details of behaviour. No other males passed during this time although he did see off an Orange Tip that dared to venture too close - I would definitely feel that only a small proportion have emerged to date. The butterfly was seen nectaring on several flowers of Lesser Celandine and The photo shows a small fly of unknown species that was in attendance for about half an hour. It would perch at various locations, within about a centimetre, always facing the butterfly. Mark.

There is always hope...

Delighted to read that the slightly crippled male first noted in the main territory on Rodborough Common on Sat May 4th managed to find a mate and thoroughly express himself as a male Burgundy (see Simon Primrose's post of May 6th).  When he first appeared on Sat 4th he could hardly fly, his wings were too soft.  He had probably been unable to expand his wings properly as he emerged on a windy day and probably got buffeted whilst drying his wings, having crawled out from amongst a matted grass tussock, plus or minus moss.  Weak individuals are easy prey for the hunting spider Pisuara mirabilis, which is numerous amongst grass litter in Burgundy country and regularly takes mating pairs (favouring the female).  But his wings then set hard, enabling him to rampantly fulful himself.  Gentlemen, he is an example to us all... .  Here he is -


Unfortunately the jet stream has jumped south, ushering in foul and abusive weather.  My guess is that about a quarter, or at most a third, of the 2013 adult emergence has come out so far, but the worry is that the remainder, the bulk, may not be able to hold back from emerging indefinitely: they will quickly perish if they fail to hold back and are forced emerge during a sunny hour in a wet week. 

Very worrying, and not simply because I'm supposed to be helping BBC NHU to film His Grace as part of a Springwatch special on British butterflies & moths...  

First Sussex Duchess


Yesterday (11th May) I met up with Charlie Elder, author of 'While Flocks Last' (2009), an account of his quest to see all of Britain's endangered (Red List) birds. Charlie had travelled up from Devon, specifically to see the Duke of Burgundy, despite a highly dodgy weather forecast. When I set off from Worthing it was still raining, but by the time I approached Heyshott Escarpment via the familiar country lanes, the sun had appeared and it seemed a little less windy than of late. We spend a very enjoyable few hours on the slopes chatting about butterflies, and specifically the problems facing the Duke. It will come as no surprise to learn that this species will make an appearance in Charlie's next book. It sounds like a very interesting project, but I shall say no more than that. His first effort got excellent reviews.

We had only seen an Orange Tip and Green-veined White on the way up to the reserve, but soon after 11.30 am the first Duke appeared. Closer examination showed this to be my first Duchess of the year, with a fat abdomen bulging with as-yet-unfertilised eggs. We soon started to find more, including a second female. One pair of males provided my first clash of the season, but they didn't ascend to any great height given the gusty conditions. It was over all too quickly as the clouds rolled in, but I think Charlie returned to Devon with a smile on his face.

Duking In A Gale

Today (9th May) I started off at Rewell Wood, where I hoped to confirm that the Pearl-bordered Fritillary has finally started to emerge, particularly as I'm running a guided walk here this coming Sunday (12th May). I was mightily relieved to spot a freshly emerged male quite quickly. I then received a phone call from Mark Colvin, who had found a male Duke of Burgundy in a nearby woodland on the Norfolk Estate. It wasn't keen on flying in the strong, cool breeze, so it kindly waited for 30 minutes while I drove there. In fact it was so docile that I picked it up for a good close look at my equal favourite butterfly (image by MC).

I then headed off to Heyshott Escarpment where the emergence is well underway. The wind was now very strong and increasing, conditions which the Duke of Burgundy hates. Despite this I managed to locate 4 very fresh males, all showing that lovely blue lustre which typifies a newly minted Duke. These were the only butterflies brave enough to be out on the slopes. Sadly we are due for more of the same weather over the next few days, and that's likely to keep their heads down.


Mating Pair at Rodborough - Mon 6th May

Just a very quick note to say that I saw a mating pair of Dukes at the main colony site on Rodborough Common yesterday. The male had slightly deformed hind wings, that hadn't developed properly, and had apparently been first seen there 3 or 4 days previously. No other Duke sightings, just those two.

Masses of other butterfly activity though, but mainly restricted to this same small, sheltered, area in which the Duke colony is centred. As well as the usual common spring species I saw a Speckled Wood, about 8 or 9 Dingy Skippers and, if I said I had 40 sightings of Green Hairstreaks, I think that would be a gross UNDER-estimate!! Looks like they're going to have a great season!

Mon May 6th

Here's my diary entry for today.  Please note than on this day in 1990 I counted 96 Duke of Burgundies along the Noar Hill transect route (1 hr 15 mins), and only failed to get the century up because a butterfly photographer had displaced most of them from the best area (23 years on, and I'm still cross)...  The pit names will mean nothing to you - suffice it that they all have names, some of them two or three.

Mon May 6th              May Bank Holiday
Perfect!  Cloudless till some haze development late on.  Calm.  22C. 
Noar Hill, Selborne.  9.05-11.40.
I arrived to sound of the lark ascending, then left to the screaming of jays.  The first Duke of Burgundy Fritillary of the year was seen here by Tony James last Wed, the 1st.  This was also the first seen nationally.  I was surprised it began so early in this late spring (in the late spring of 1986 it didn’t start before May 16th, though the start of the month was poor).  Today, although I arrived a little early in the morning, it was apparent that the butterfly hasn’t got going here at all properly yet.  I struggled to see 10 males in a good search of the pits, all bar three of which had been out a day or more.  Tony began the transect at 11.30 and totalled only 6, though he reckoned he under-recorded due to disturbance by photographers.  Nights have probably been too cool for any significant emergence.
I saw my first at 9.25, in the Gooseberry Pit.  Then no more until one at the entrance to the Bromus Pit.  Then, remarkably, none in two visits to S10 / the Woodspurge Bank (and Tony recorded none there too), but I saw another male at the end of S12.  Also singletons in the Rubi Pit (todays), Willow Warbler Pit, Yellowhammer Pit, then 3 in KVP (S3) and one in the entrance Quarry Pit. 
The good news is that habitat conditions are great for this butterfly.  No rabbits and there’s just been some light winter sheep grazing in the Middle Pits.  It looks like a good cowslip year generally, certainly so here, with frequent flower heads over the whole reserve.  The turf height is currently perfect for Duke of Burgundy, 12-20cm on average, with plenty of moss and matted F. rubra tussocks etc.  That’s the good news. 
Butterflies were scarce generally, though I started a little too early.  Good to see a Holly Blue around one of the Rubi Pit hollies and glimpse a Dingy Skipper (Noar Hill’s first of the year) in the Bee Orchid Pit. 
I managed 5 Orange Tip males, including three together in the Quarry Pit, fighting.  Only 2 Green-veined White.  1 Small White in S12 and a lone Brimstone male in the Quarry Pit (Tony reckons all the buckthorn bushes have been cut down…).  Also 4 Peacock. 
Good to see Osmia bicolor in S10 and 2 Bombylius discolor.  Neither species occurred here in my era. 
Very much silent spring here, with not a single willow warbler.  The saving grace was common whitethroat – I heard 8, which isn’t bad.  Strangely, a trio of tree pipit – 1 in S8 and a pair above S12.  But whitethroats apart the place was rather silent…
Tony’s transect figures: 6 Duke of Burgundy, 4 Orange Tip, 3 Brimstone, 2 Comma (in S1, only I didn’t see them), 1 Peacock, 1 Green Hairstreak and 1 Small White. 





Rake Bottom, Butser Hill.  Hants.  12.15-1.15.
My first visit here for some time.  The northern end of the combe, where the slope is west-facing, has developed a sizeable Duke of Burgundy Fritillary population.  Dan Hoare counted 40 in this area on 24/5/2010.  There are several acres of steep slope here with frequent cowslips amongst 10-15cm matted F. rubra turf with frequent clumps of B. sylvaticum here, with patches of hawthorn scrub.  Hairy Violets are also pretty good, so Dark-green Fritillary may be quite reasonable here too.  Round the corner, after the combe twists, the southern half of the slope is as it was – very short turf with open air rabbit burrows and areas of bare chalk.  HCC has recently cleared areas of moderate to dense hawthorn-dominated scrub in the northern half, which should benefit Duke of Burgundy. 
I saw only 4 Duke of Burgundy here, all in the main area, 3 fresh males and a fresh female.  All had emerged today probably.  Looks like the season is even less advanced here than at Noar Hill. 
Also, great to see 8 Grizzled Skipper.  7 territorial males, one tussling with a Duke, and a fresh female – who blundered into a male territory and was instantly courted (I lost them).  Obviously, quite a reasonable population here, though it wasn’t obvious what it’s breeding on (I didn’t note and Wild Strawberry).  A fresh Dingy Skipper male too.  Also, 7 Peacock, 1 Small Tortoiseshell and 5 wandering Brimstone males.  Strangely, nothing in the lane leading up from Ramsdean.


I also spent 45 mins wandering along the north-facing slope of Ramsdean Down, but didn’t get anything like as far as Rakefield Hanger and Little Butser.  There are apparently small colonies of Duke of Burgundy dotted all along the slope bottoms here, right up to the cross dykes above Little Butser.  On my way out I met Mark Bridges who had just visited Little Butser and seen precious little, and no Duke of Burgundy.  Ramsdean also has a low rabbit population (Little Butser is still rabbit country) but there is much constipated rank F rubra turf with a lowish herb content.  Good cowslips etc, often amongst rather ruderals vegetation along the lower slopes.  I saw only the odd Peacock here. 

I finished the day with an hour or so in and around the delightful Bo Peep Copse, which I discovered back in 1976.  It has a wonderful flora, with much Solomon’s seal and patches of Herb Paris amongst the bluebells.  Also, moschatel, sanicle, yellow archangel and goldilocks, and some tall flowering cherries.  The western end was coppice ca 3-5 years back and is regrowing strongly.  The little pond is delightful still, with a healthy population of small rudd and evidently not too many carp.  Various Orange Tip, Green-veined White and Brimstone wandering around here. 


His Grace at Rodborough Common, Cotswolds

Two males were seen in the main territory at Rodborough Common, near Stroud, yesterday, May 3rd.  These were the first sightings there this year, and I think the first in the Cotswolds.  Today was a little too windy there and only a single male was seen.  I checked two other Rodborough colonies without success.

I have an accurate set of records of His Grace's appearance at the main Rodborough site (Manor Spur) since 1993 (earliest and latest dates are in italics):

1993                     1994                     1995                    1996                     1997                1998                 
28th April             2nd May                14th April           7th May                21st April        25th April        

1999                     2000                     2001                     2002                     2003                    
24th April             27th April             5th May               21st April             15th April

2004                     2005                     2006                     2007                     2008
2nd May                30th April             1st May               16th April            27th April
(?26/4)                                                                                                         (?26th)

2009                     2010                     2011                     2012                     2013
20th April             23rd April             9th April              12th April             3rd May


So, this is the third latest the butterfly has appeared here, after 7/5/1996 and 5/5/2001.  It's been out in April here in at least 15 of those 21 years. 

I have a much longer data set for the start of the flight season at Noar Hill, Selborne, running back to the long hot summer of 1976.  That data really does show that the butterfly's season there is getting earlier and earlier.  Of course, what I don't have is such good information on the last sightings of the year...


First of the year

I have been keeping an eye on the weather and paying short visits to Butser Hill over the last couple of weeks to search for Grizzled skippers. The south facing slopes here warm up very quickly and normally produce at this time of the year once we have had a couple of days of reasonable weather . I have found that Dukes normally appear here about 5/7 days after the first grizzly.
However it would seem that the earliest site in Hampshire is normally Noar Hill. So having seen a solitary Grizzled Skipper at Butser on Sunday and seeing the weather forecast for the first few days of the week were good I pencilled in a trip to Noar Hill on Wednesday.
As I travelled up theA3 the Hampshire Hangers looked like it was still winter with virtually no leaves on the beech trees whatsoever. However it was warm and sunny which was a bonus.
As I worked my way through the ancient pits at Noar Hill it was very warm in the sheltered micro climates of each bowl and reinforced why this is such a diverse site for flora and fauna. It always makes me smile when I visit Noar Hill to think that it is a man made site formed as a result of medieval chalk digging - imagine the furore such a proposal would cause now!
Butterflies were out and about in force and numbers of peacock, brimstone and orange tip were noted when I caught my first, if brief, sight of a Duke as it disappeared over the rim of one of the pits - result!
This focused my searching and shortly after I located another individual in an adjecent pit which appeared freshly emerged and still rather weak in flight. It gave a good photo opportunity but I then left it in peace to conserve its energy for the battles with other males which would inevitably lay ahead over the coming days.
I have earmarked a number of areas to explore over the weekend - some I know and some are new to me - one or two are just 'prospects' with no form known to me. With the weather looking good hopefully the outcome will be positive.
Mark

Fortunes Of The Sussex Duke In 2012

The following article is the 'Species Champion' summary for Duke of Burgundy, reproduced from the Sussex Butterfly Report 2012 - Issue 5, Spring 2013. How did the butterfly do on your patch?

In line with most of our species, the Duke of Burgundy had a difficult time in 2012, courtesy of the Great British weather. In the last couple of issues it has been very satisfying to publish bar charts demonstrating year-on-year increases in the Sussex population of this nationally threatened species. We hope to do this again in the years ahead, but this season was all about damage limitation. Thankfully, all remaining ‘Duke’ sites in Sussex are under active management and in good condition, a situation which will soften the impact of the extremes in weather experienced this year. Despite the significant drop in the number of butterflies recorded on most sites, abundance figures remain higher than for many years prior to 2010 (total 2012 count = 360).

In most locations we saw a reduction of between 50% and 75% on 2011 totals, although one or two sites remained virtually unscathed. The one area that gives genuine cause for concern is in the far west of Sussex, close to the Hampshire border. Although the relentlessly poor weather severely restricted surveying opportunities, no butterflies were seen at either Harting Down or Treyford Hill. It will be very important to assess the situation here as a matter of urgency in 2013. Looking at the bigger picture, it will be surprising if at least one or two of the last remaining UK colonies, of which there are approximately 90, has not been lost; in some parts of the country the entire flight season was conducted under grey skies.

The first male was seen at Heyshott Escarpment on 22nd April, but it would be another 5 days before the second appeared in a wood near Arundel. This slow, faltering start was typical of all our spring species this year. It was not until the third week of May that the Sussex population peaked, as the majority of individuals held back from emergence, in anticipation of better weather. Butterflies can delay the completion of their life-cycle in this manner for up to three weeks or more, but by doing so they suffer a significantly increased mortality rate. As the point of no return is reached, desiccation becomes a major factor, and the total number of healthy adults produced will fall.

On the cooler, north-facing slopes ‘Dukes’ were still emerging during the last week of May and a timely spell of much better weather will have saved the local population from potentially much worse. The last survey this year, conducted on 29th May, recorded 57 specimens over 4 different locations, so the butterfly probably persisted until mid June.

One of the many different factors which influence the Duke of Burgundy population from year to year is larval survival rate. In some years the species suffers particularly badly at this stage of the life-cycle, through droughting of the Primula food-plants; droughting was not a problem during the summer of 2012!   

With all of the ongoing habitat management work for this species across West Sussex, I am optimistic that ‘the Duke’ will make a rapid recovery from this downturn in its fortunes. As always, thanks are extended to those who provide such tireless support in conserving this species, most notably the South Downs National Park Authority, Murray Downland Trust, Norfolk Estate, West Dean Estate and other local landowners.
 

      

 

 

Image Test

Partly to test how large an image can be posted here, and also to get the juices flowing as the new season approaches, here's a pair caught in flagrante delicto on my guided walk at Heyshott last May.

The Dukes Of Heyshott - Here We Go!

To set the ball rolling, here's an article I penned for the Murray Downland Trust Seventeenth Annual Report (2011). It perhaps gives us hope that by working together and sharing ideas through a forum such as this, we can preserve this beautiful and charismatic butterfly for the enjoyment of future generations.

The Dukes of Heyshott 

The Duke of Burgundy is one of the two most rapidly declining and threatened species of butterfly in the UK, which together with the High Brown Fritillary now faces potential extinction unless conservation measures are successful in halting and reversing the current trend of population losses. Fewer than 100 colonies remain, with West Sussex being at the retreating eastern front of the species’ geographical distribution, leaving just isolated outliers in Kent. The vast majority of remaining colonies are very small, comprising no more than a handful of adult insects on the wing at any time during its late April to early June flight season. Populations where maximum daily counts exceed 30 butterflies are now very rare and in 2003 the total number of Duke of Burgundy adults seen in the county was 8. I remember Colin Pratt F.R.E.S., the county recorder, showing me a histogram depicting the number of 2 Km squares occupied by ‘the Duke’ since the 19th Century; extrapolation of the ever-downwards trend clearly suggesting that the species was unlikely to outlive the second decade of the 21st Century in Sussex. This is a butterfly in dire straits. 

The Duke of Burgundy is the flyweight champion of the butterfly world, being so pugnacious that all other species are attacked should they stray across the male’s fiercely guarded territory, irrespective of their size. He is only as large as one of the blue family. The males will often congregate in small ‘leks’ where in-fighting is almost constant between the hours of 11am and 3pm. Although he can occasionally be seen outside these hours ‘the Duke’ is very lazy, rising late and retiring early. Combatants typically spiral upwards in vertical climbs of up to 50 metres before dropping back to their eagerly contested perches on low scrub. The females are better behaved and go about their business of laying eggs as discreetly as possible. These are deposited singly, or sometimes in twos and threes, on the underside of cowslip leaves, or on primrose in more wooded habitats. She is notoriously fussy about her selection of egg-laying sites, this being a critical issue to which I will return. The sexes are broadly similar in appearance, with a network of dark bars and stripes over a ginger-brown base colour, giving the general appearance of a fritillary; indeed this was once called the Duke of Burgundy Fritillary. However, the taxonomists now place this butterfly in a family of its own, at least in the UK, although there are relatives living abroad. At home ‘the Duke’ is unique in that the male has vastly reduced front legs and uses only the rear two pairs for walking, whereas the female has all six legs fully developed.  

In West Sussex there are now less than a dozen sites supporting the Duke of Burgundy and many of these could be lumped together, leaving just 5 population centres. I personally began to work in earnest on ‘the Duke problem’ in 2005, but it was April 2007 before I met up with Bruce Middleton and Butterfly Conservation’s SE Regional Officer Dr Dan Hoare on the slopes of Heyshott Escarpment. At the time the population here had hung on by its fingernails for many years, with maximum daily counts of just 2 or 3 insects at the small ‘lek’ within Compartment 10. Although the management of the reserve at that time suited most of the flora and fauna, it was not quite right for ‘the Duke’. Since then the Murray Downland Trust and Butterfly Conservation Sussex Branch have worked very closely together in improving things for this species. Sometimes conservation necessitates that we rob Peter to pay Paul and it is difficult to please all of the plants, invertebrates and those further up the food-chain all of the time. However, the MDT project team led by Mike Edwards has done a fantastic job in doing just this, although it is of course vital that ongoing monitoring gives early warning of any disadvantageous changes in the other valuable inhabitants of this wonderfully diverse site.  

At the moment everything seems happy, while the results achieved so far for the Duke of Burgundy have been nothing short of remarkable. As changes in the habitat management took effect maximum daily counts began to rise; 7 and 8 in 2008 and 2009, then leaping up to 51 in 2010 and a mighty 115 this spring (2011). It is rare for the term ‘population explosion’ to be applied to this butterfly and these figures buck the national trend, proving that the decline can be reversed where focused efforts are made to satisfy its highly fussy needs. Similar results have been achieved on another Sussex site over the same time period. There are other winged beneficiaries too, as nationally declining species such as the Dingy Skipper are doing exceptionally well here. This butterfly also prefers that seemingly awkward ground between early and mid succession habitats. And there’s the rub. It is only by targeted management that some species with very particular requirements will thrive. It is these species which unfortunately often suffer (and sometimes go extinct) at the hands of a one-size-fits-all philosophy for managing ‘whole habitats’ such as calcicolous grassland. It is due to the care and attention to detail given to the MDT management plan that these tricky species are doing so well, alongside thriving populations of their less demanding neighbours. 

So what is it that makes life so difficult for the Duke of Burgundy, whose food-plants are so widespread across superficially suitable tracts of our landscape? As always with these species the devil is in the detail. The cowslips must be in the correct growth form and in a precisely suitable position for the fussy ‘Duchess’ to consider leaving one or two of her pearly, pale green eggs behind. Leaves that are medium or large sized, fleshy and semi-erect are strongly preferred and these are often found where slightly longer swards are developed, often in the shade of taller scrub or trees, or where ‘soft’, advancing, low scrub edges are to be found. Turf which is over-grazed by the more familiar breeds of sheep soon becomes unsuitably short and tight, hosting only small cowslips with tiny leaves pressed close to the ground in fear. The situation only becomes worse when the rabbit follows with enthusiasm. Scrub cutting must be truly rotational, as continually cutting to the same template soon creates ‘hard’, unsuitable edges. Nearly right is not good enough for this butterfly. 

Of course Heyshott Escarpment is not just about the Duke of Burgundy. It’s a fabulous place to visit at any time of the year, with views from the upper levels which are hard to beat anywhere within our National Park. But springtime is the time to be here, when the early orchids are in flower and ‘the Duke’ is on the wing. The supporting cast is strong, including Dingy and Grizzled Skippers, Brown Argus, Common Blue and the Green Hairstreak, a butterfly so exotically green that it would not look out of place in a South American rainforest.  

As winter approaches I look forward to joining MDT and BC Sussex volunteers on the reserve, where there will be much to do if the exciting plans for this coming work party season are to be completed. This will make even more room for, amongst other things, this charismatic little butterfly. Heyshott Escarpment has already achieved a position amongst the very best Duke of Burgundy sites in the UK. Only time will tell just how good it can get. 

FOOTNOTE: Duke of Burgundy numbers fell back significantly during the spring of 2012, as they did on the majority of sites. This was undoubtedly due to the exceptionally adverse weather suffered during the period before and throughout most of the flight season. However, larval survival is likely to be high due to the good condition of the food plant and we will hopefully see a recovery in numbers over the next year or two.

 

Burgundy Blog Launch

After the success of The Purple Empire and more recently, Ash Brownies, i had my arm (very easily) twisted into creating and designing a new blog for the beautiful Duke of Burgundy butterfly. The ideas and principles are the same: WE NEED YOU to contribute your sightings, photographs, trip reports etc from around the UK. With the flight period fast approaching (April/May) - hopefully with more favourable weather than all this snow we've been having! - now is a fantastic time to join the blog. As long as its Duke of Burgundy related, we want to know about it!

If you're interested in getting involved, please email Neil Hulme at nh@nhulme.eclipse.co.uk and you will receive an email inviting you to join the blog. If this email does not appear in your inbox, please check your spam folder. All you have to do is click on the link provided in the email and follow the easy instructions to sign up. You can write a new post by signing in at blogger.com. Do get in touch if anyone encounters any problems!


The stunning Duke of Burgundy - courtesy of Iain H Leach.

Heres hoping for a Bumper Burgundy year :)