Photo Blog

I love observing nature through the changing seasons both in my Norfolk wildlife garden and the surrounding countryside. I blog about wildlife gardening as well as about Norfolk butterflies, wildflowers and other flora and fauna that I come across. Bookmark my Norfolk nature photo blog to keep up to date with my photographic adventures.

The Acorn and the Jay

An Eurasian Jay holding an Acorn in its beak about to bury it in the grass (photo taken through a glass window).

Earlier this month I had a wonderful encounter with an Eurasian Jay that was busy burying an acorn, which got me curious about the relationship between the two.

We've had Oak seedlings pop up in our garden before, which, in the notable absence of Grey Squirrels, almost certainly had to have been planted by Jays, but I had no idea of the importance or complexity of the relationship between the two species.

The Eurasian Jay has a fantastic Latin name of Garrulus glandarius, meaning "chatty" and "acorn" respectively, which is an indication just how close a relationship the bird has with Oaks and their acorns.

Jays collect and store large quantities of acorns of Quercus Oaks in a mutualistic relationship that disperses the keystone Oak species in open scrubland where the shade intolerant tree can establish itself well, even choosing the largest most viable acorns. An estimated 2,200- 5,700 acorns are "scatter hoarded" in this way during autumn.

The Jay, a highly intelligent member of the Corvid bird family, then utilises vertical structures nearby to remember the location of approximately 75% of its cache, leaving around 25% of the acorns to germinate. Jays are only able to find acorns they've cached themselves or observed another bird caching.

Jays are believed to prefer the most nutritious acorns, selecting large acorns of Quercus ilex, Quercus suber, and Quercus faginea, whilst avoiding acorns from Quercus coccifera. Quercus ilex acorns having the highest fat content while Quercus coccifera acorns contain the most tannin of the four species.

In my case the acorn was cached 77 yards / 70.4 metres away from the parent tree, which corresponded well with research I found on their scatter hoarding behaviour. In one two year study dispersal distance ranged from 3m to 456m from the parent tree, with most acorns cached less than 100m from the source Oak.

Jays seasonal foraging behaviour further helps the Oak in that they hunt acorns least during the acorn's sensitive early spring germination phase. Jays then resume acorn hunting more intensively during May to July once it has offspring to feed. When a Jay comes across an Oak seedling growing in a spot where they recall caching an acorn, they will uproot the young plant, eat the acorn, and then crudely replant it, which the seedling usually survives.

Thanks to the Jay's important role in the spread and renewal of keystone Quercus Oak tree species in the landscape they have become known as "ecosystem engineers". One Swedish study even attempted to calculate the replacement cost of the oak planting "ecological service" that Jays provide for a particular municipal parkland area.

Resources and References

This insightful Aboriculture Blog summarising a chapter from Vera, F. (2000) Grazing Ecology and Forest History

Animal Diversity - Eurasian Jay Species Account

Dispersal Distance and Burial Mode of Acorns in Eurasian Jays Garrulus glandarius in European Temperate Forests , P Kurek, D Dobrowolska, B Wiatrowska, Acta Ornithologica, March 2019

Observations on the collection and burial of acorns by jays in Hainault Forest, MR Chettleburgh, British birds 45, 359-364, 1952

Spatial patterns of dispersal, seed predation and germination during colonization of abandoned grassland by Quercus petraea and Corylus avellana, Johannes Kollmann, Hans-Peter Schill, Vegetatio 125, 193-205, 1996 

Acorn dispersal estimated by radio-tracking, Pons, Josep & Pausas, Oecologia153(4):903-11, 2007


A Painted Lady Summer

Painted Lady, Vanessa cardui nectaring on white Buddleia. Will 2019 be a record-breaking Painted Lady summer?

As the Butterfly Conservation Society’s annual three week long Big Butterfly Count draws to a close, the UK looks set to have enjoyed the magical, once-in-a-decade phenomenon called a “Painted Lady summer” when the apricot- and black-marked species arrives here en masse.

The last such event occured in 2009, when some 11 million Painted Ladies, known as Vanessa cardui, arrived on our shores and there is speculation that 2019 could be a record-breaking year.

But how is it that a butterfly that doesn’t survive our winters and isn’t even permanently resident in the UK manages to congregate here in such numbers?

The Painted Lady, a member of the large and colourful Nymphalidae butterfly family, is a poweful flyer and long distance migrant. During its migration it can achieve an impressive speed of almost 30 miles per hour and fly some 100 miles in a day. In fact, it’s 7,500 mile round trip migration from North Africa as far north as the arctic circle is even longer than that of the famous Monarch butterfly, which travels up and down the North American seabord.

Freshly emerged, second generation Painted Lady nectaring on a budding Common Knapweed flower

Despite its flying prowess, like the Monarch butterfly, Vanessa cardui traverses its intercontinental route multigenerationally and, having only a 2 week long life span, takes about 6 generations to complete it.

Each season the butterfly flies northwards from the desert fringes of North Africa to reach mainland Europe and then on to the UK, reaching Britain in late March. Here the newly arrived lepidopteran immigrant lays eggs on Marsh and other Thistles, Viper’s Bugloss, Mallow and Nettles. After about a month-and-a-half later the next generation emerges (46 days according to devoted turn of the century lepidopterist F. W. Frohawk).

These native-born Painted Ladies then lay a brood of their own, which, further supplemented by arrivals from both Europe and Scandinavia, significantily boosts numbers towards late summer. Some of these butterflies will commence the return migration southwards as the seasonal conditions turn.

So what makes the once in a decade “Painted Lady year” of mass abundance occur? Experts believe that the butterfly’s migratory instinct may be triggered by population density (leading to competition for egglaying sites and food sources) and in exceptional years, unusually good food availability and favourable weather conditions foster population booms. This in turn triggers mass North- and Easterly-bound migrations, often with hundreds, even thousands of butterflies reaching landfall along the UK’s East and South coastline, some arriving from Europe, others from Scandinavia and some even directly from Africa in favourable windstreams.

As well as Thistles for egg laying, depending on its generation, adult Painted Lady butterflies will nectar on a wide range of plants. These include Knapweeds, Buddleia, Trefoils, Hawkweeds, Heather, Privet, Ivy, Bugle and Clovers, so planting these species, and tolerating that annoying thistle or two (you can always deadhead later to stop the patch growing!) increases the likelihood of you attracting this orgeous, intricately-marked butterfly into your garden and enjoying your very own Painted Lady Summer.

Cheery Cowslips

Cowslips are invaluable to early pollinators and have a long flowering period

The mid-Spring superstar of our wildflower meadow this year was undoubtably the humble Cowslip, Primula veris. I’d always hoped to see them in my wildlife garden, as not far up the lane from my cottage is a little tucked away-clearing near a small copse that is too small to farm and in springtime always seemed to be bursting full of rich custard-coloured Cowslips mixing in beautifully with the deep indigo of native Bluebells.

Disappointingly, despite their inclusion in my native seedmix for clay soil, for the first two years not a single one materialised. I philosophically put it down to the soil conditions or an unlucky batch mix and thought I might sow some plugs another year.

Then unexpectedly, the very next spring just a smattering appeared! I was overjoyed to learn that it was simply that their seeds can take several seasons to germinate and interpreted it as an encouraging sign our meadow ecosystem was establishing itself well naturally.

Since then they’ve gone from strength to strength, spreading almost right across the small sward. They must particularly like cool dry springs as this year, our meadow’s sixth season, has been their best appearance to date.

Wildlife Value of Cowslips

Aside from their cheerful colour and long lasting flowerheads, they have a healthy wildlife value. Their flowers are a vital resource for pollinators, particularly for early solitary bee species, quite a few of which frequent our garden, but also for butterflies such as the Brimstone butterfly and other insects such as beetles. They are also the caterpillar plant for the Duke of Burgundy butterfly, which is unfortunately not resident in Norfolk.

A member of the Primula family, the Cowslip shares more than a passing resemblance to it's cousins the Primrose Primula vulgaris and the Oxlip Primula elatior, however both of these lack its pleasant apricot perfume and have more open paler lemon-hued flowers.

Plant Folklore of Cowslips

Cowslips can take several years to establish in a new meadow

Amusingly the Cowslip’s latin name Primula veris romantically deems it the “true” primrose, while its established English name more, ahem, rustically refers to its habit of growing near “cow’s slops” or cowpats in grazing pasture. It does have over two dozen pleasanter names in traditional folklore including other farming references such as Milk Maidens, descriptive names such as Freckled face, Golden Drops and Long legs as well as biblical names mentioning Mary or alluding to a myth that Cowslips sprang up where St Peter dropped the keys to heaven, perhaps in a cow pat!

Cowslips’ varied folklore names include: Artetyke, Arthritica, Buckles, Bunch of keys, Crewel, Drelip, Fairy Cups, Fairies' flower, Freckled face, Golden drops, Herb Peter, Hey-flower, Paigle, Peggle, Key Flower, Key of Heaven, Lady's fingers, Long legs, Milk maidens, Mayflower, Mary's tears, Our Lady's Keys, Palsywort, Password, Petty Mulleins, Plumrocks, Tisty-tosty. Welsh: dagrau Mair meaning Mary's tears, Anglo-Saxon: Cuy lippe, Greek: Paralysio.

The Cowslip has a rich cultural and culinary history too; traditionally it decorated Mayday garlands and was strewn along churchyard pathways at weddings and religious festivals. The Cowslip was used medicinally to aid sleep and heal coughs as well as to make Cowslip wine and “Tisty-tosty”, little balls of crushed up Cowslip flowers.

In the literary world the Cowslip’s honours include mentions in Shakespeare’s “The Tempest” and “Henry V” plays as well as featuring in Keats’ poem of Springtime romance “Hither, hither love”.

Hither, hither, love —

‘Tis a shady mead —

Hither, hither, love!

Let us feed and feed!

Hither, hither, sweet —

’Tis a cowslip bed —

Hither, hither, sweet!

'Tis with dew bespread!

Hither, hither, dear —

By the breath of life —

Hither, hither, dear!

Be the summer’s wife!

Though one moment’s pleasure

In one moment flies —

Though the passion’s treasure

In one moment dies —

Yet it has not passed —

Think how near, how near! —

And while it doth last,

Think how dear, how dear!

Hither, hither, hither

Love its boon has sent —

If I die and wither

I shall die content!

John Keats









And Breathe... Spring is here!

Just when you think you really can’t take it any more, finally the temperatures drift up, the first Blackthorn blossom appears in the hedgerows on still naked stems and you know that Spring, at long last, is here.

February Gold and a Fool's Spring

With the synthetic cheer of the twinkling fairy lights of Christmas in the dim and distant past, the long dark trek to springtime always feels like a brutally hard slog.

The ground seems stark, barren and lifeless. Yet all the while beneath the surface plants and trees are quietly, imperceptibly getting ready to burst out from their winter buds.

Catkins, male flowers of many common native shrubs and trees such as Hazel (Corylus avellana) and Birch trees (Betula pendula) are among the earliest augurs of that yearned for spring. As the days rapidly lengthen, golden evenings start to appear, bathing the delicate, golden chains of late winter catkins in beautiful light.

In contrast to the deep chill and bitter Beast from the East last year, winter 2019 has been remarkably mild. This February has even proven to be the warmest one on record thanks to a brief flurry of sunny mild days that heartened us all with a tantalising promise, however fleeting, of warmer days to come. One mild evening in mid-February I took advantage of the rich late afternoon light during our "fool's spring" to do a little study of the Hazel and Birch tree catkins in my garden.

I learned that branches carry both male and female flowers with the male catkins emerging first. Hazel trees carry tiny little female red flowers that emerge soon after higher up the branch stem, whereas Birch trees have small, bright green, upward curving female catkins.

Catkin pollen is intended to be windborne to pollinate other trees, there being so few insect pollinators about at the time of year, so it has evolved to have a self-repelling quality meaning that bees and other insects struggle to collect much of it, although it is a food source for them at a time of scarcity.

Despite the luscious hue of light, the days rapidly turned back to chilly ones with even our fool’s spring warmth quickly forgotten. But soon, soon true Spring will burst forth in her lush green finery and the late winter gold fade out of memory.

Male Birch tree, betual penduula, catkins

Male Hazel tree, Corylus avellana, catkin in golden light

Close up of male Hazel tree, Corylus avellana, catkin

Male Hazel tree, Corylus avellana, catkin in the dying embers

Smoothly Enters the Newt

A surprising number of tadpoles survived this year's late snow and frosts to hatch out, proving that nature has long coped with such seasonal extremes. Once hatched, a tadpole's lot does not get easier by any means, because along with the warmth, their nemesis the Common newts have returned.

Common newts, also known as Smooth newts, predate heavily on tadpoles and frogspawn in springtime, and male Common newts can be spotted due to their vivid orange and black spotted underbelly which is a temporary colouring worn during the mating season.

Male Common or Smooth newt in orange mating colours

Common newt hunting among newly hatched tadpoles

The Beast from the East

Winter definitely had a vicious sting in its tail this February. A "sudden stratospheric warming" over the North Pole, in itself disturbing at this time of year according to climatologists, caused a sharp cooling in lower levels of our atmosphere and via a complex chain of meteorological events reminiscent of the metaphor about the butterfly that flapped its wings on one continent and caused a hurricane on another, brought about heavy snowfall that covered virtually all of the British Isles.

An unusually strong and harsh northeasterly wind stream dubbed the "Beast from the East" triggered a bitter cold snap then swept in heavy snowfall, which was in turn intensified by strong drifting due to the fierce, biting winds that blew continuously for days. 

Here in big sky Norfolk we were heavily exposed to "the Beast" and much of the county was cut off by incredibly large snowdrifts formed by its winds. These, I noticed, were far deeper in areas where the farmers' field verges lacked hedging, a stark reminder of the environmental value of this oft overlooked habitat, which for many years was ripped out to maximise the yield potential of the land in ill-conceived agricultural efficiency drives.

Thankfully many incentives now exist for re-establishment of these vital wildlife corridors and natural windbreaks, so hopefully Norfolk will improve its reputation among hedge layers in years to come. 

"The Beast from the East" blowing snow across an arable field, creating a misty haze

In Search of Autumn...

Our mellow autumnal weather seems to be both treating and playing tricks on us this year.

Mingled gold and green birch leaves

As mid October arrived I started to search for turning leaves and classic signs of Autumn, but in vain. With such mild temperatures, the trees have determinedly held on to their cloaks of green as long as possible to maximise their intake of food.

A Stroll in Blickling Estate at the start of half term week yielded some fallen leaves but the canopy was disappointingly still richly decked in a gown of glorious green, with only the occasional tree starting to offer up a hint of gold at the very top of their crowns.

At last on a visit to Wells-Next-The-Sea at the end of the week, the mood had started to shift and begun to evoke a more autumnal tone. A gorgeously mild day, I watched several Red Admirals dancing brightly in the deceptively warm golden rays of the afternoon sun, but at last, I finally saw my first fully golden-gowned birch tree!

Meanwhile, further along the pathway, a suitably russet-hued Common Darter dragonfly cast a long shadow as it perched on a fallen pine introducing rich red umber tones to the Autumnal palette. 

Phew! - our tardy Lady Autumn really has finally arrived with her gown of gold, just in time for the clocks to go back.

A red Common Darter dragonfly enjoying late October sunshine on a fallen pine tree

A still green canopy at Blickling Estate

A birch tree dressed in full golden regalia

A Purple Streak

The colour purple became my leitmotiv during early July. It is the season of the purple butterflies and therein lies a tale of mystery and obsession...

The Oak tree canopy is a habitat for both Purple Emperor and Purple Hairstreak butterflies, which both feed on aphid honeydew

The Oak tree canopy is a habitat for both Purple Emperor and Purple Hairstreak butterflies, which both feed on aphid honeydew

Two very different, yet equally enigmatic, purple butterfly species are on the wing towards the end of June into mid-July. Though very different in fame and stature, both share two things in common: a fondness for the heady heights of mature Oak tree canopies in deciduous woodland and a strong reputation for elusiveness and ability to evade the gaze of even the most determined of butterfly seekers.  

Since being drawn into the world of butterflying I've discovered that, since time immemorial, avid butterfly chasers have gone temporarily a little doolally at this time of year. The hysteria is all over a certain famous, purple-cloaked member of the royal family who is not, officially at any rate, currently resident in Norfolk - the magnificent Purple Emperor. 

Known affectionately to his acolytes as "his Majesty" or sometimes simply "Iris", the Purple Emperor is neither Britain's largest butterfly (our very own Norfolk Swallowtail),  nor the rarest (the once extinct, recently reintroduced Large Blue), nor even the brightest (arguably the Silver-washed Fritillary) so this seemingly bizarre Purple Emperor obsession had been puzzling me for some time. Just what quality is it that bewitches them all? Is it the dramatic colour purple? Their reputed vigorous flight and aggressive behaviour? Or some other mysterious factor altogether ....?

After an inspiring talk by renowned butterfly conservationist and Purple Emperor advocate Matthew Oates at Norfolk Butterfly Conservation's AGM back in 2016, I became intrigued and not a little bewitched myself. In a bid to sate my curiosity and discover the obscure reason for the Purple Emperor's celebrity status for myself, I started planning a field trip to visit his Imperial Majesty's haunts, mature Oak and Sallow woodland rides.

Alas fate was not on my side,  despite attempts to make visits to Fermyn Woods in Northants, Wood Walton Fen in Cambridgeshire or Theberton in Suffolk, life events have intervened and scuppered my plans well and truly for this year. Perhaps Iris is to be my new five year nemesis butterfly, who knows. 

With my ability to range much curtailed, I was crestfallen and deeply disappointed. But there was still the second less famous, but to me equally elusive, purple butterfly to discover: the Purple Hairstreak butterfly, Neozephyrus quercus. And it lives much closer to home.

Although much smaller, the Purple Hairstreak butterfly shares a surprising number of characteristics in common with its larger Imperial cousin. As suggested by its Latin species name "quercus" it too favours mature deciduous oak woodland and so is also highly elusive (and under-reported) as a result to its habit of dwelling up high amongst the tree canopy. There it lives on honeydew produced by aphids and only rarely descends from the "throne" for the odd sip of bramble nectar.

A Purple Hairstreak butterfly perched on an Oak tree leaf near the edge of Syderstone Common, Norfolk

A Purple Hairstreak butterfly perched on an Oak tree leaf near the edge of Syderstone Common, Norfolk

While laid up I did my research thoroughly. Purple Hairstreaks being far more widespread than his majesty, I was able to find some promising local locations in Norfolk, and had in fact already experienced my first brief glimpse of a old faded and tattered Purple Hairstreak on a dog walk at Holkham Hall one August a few years back. I took a punt on a very short run up to the nearby Syderstone Common nature reserve,  on the edge of North Norfolk coastal AONB. Its a large reserve of lowland gorse heathland, an SSSI that is famous for its Natterjack toad population, but not all that much else, in fact a previous visit had left me visually underwhelmed. This time however the reserve was transmuted into a spectacular sea of vivid fuchsia pink willowherb flowers swaying in the gentle breeze.

Essex Skipper butterfly perched on a Rosebay Willowherb flower spike

Essex Skipper butterfly perched on a Rosebay Willowherb flower spike

My fieldcraft skills must have improved somewhat as I was delighted to spot an active Purple Hairstreak quite soon into my visit. There it was, a small grey blob fluttering away right up high in the treetops, initially silhouetted against the cloudy sky. Its flight was erratic and it was hard to keep track as the butterfly flitted amongst the oak treetop and nearby birches in the mature woodland circling this now spectactularly beautiful reserve.

After spotting my Hairstreak's "Master" Oak I stayed for some time, craning my neck to try to spot this diminutive butterfly amongst the oak leaves. Eventually one dropped a little lower and permitted a quick shot before circling up high again in a cluster of nearby Birches.

On my way back to the car I spotted a beautiful young buck Roe Deer, who paused, checked me out for a little while then barked at me before trotting off back into the Oak woodland, a beautiful end to my successful visit. Although my sightings had been distant and tantalising, I had bagged my first purple.

Perhaps the abiding memory for me is not so much finally photographing my first purple butterfly, but rather Syderstone Common nature reserve itself, which was a natural habitat at the peak of its mid-summer glory and afforded a sensory firework display of wildflower delight at every turn.

Visually the abundant vibrant pink Rosebay Willowherb flower spires intermingled with creeping carpets of rich yellow Tormentil, while the heady scent of rambling native Honeysuckle hung in the air and bramble in full bloom. Every plant seemed to be alive, swaying in the breeze and dancing with a host of orange Skipper, Ringlet and Meadow Brown butterflies flitting about into the distance as far as the eye could see.

As for purple Royalty... I must now be patient, wait and bide my time till 2018 brings a whole new season and fresh opportunity for his Imperial Highness to ensnare me as subject.

We shall see...

Vivid pink Rosebay Willowherb can be spectactular when in full bloom

Vivid pink Rosebay Willowherb can be spectactular when in full bloom

A young Roe Deer buck on Syderstone Common, Norfolk

A young Roe Deer buck on Syderstone Common, Norfolk

A Celebration Of Diversity

In the week that saw the Pink Pride parade in London that celebrated 50 years of progress towards greater acceptance of human diversity, I was celebrating different kind of diversity success on a much smaller scale in my back garden -  the biodiversity success of wildflower varieties in my wildlife flower meadow surrounding our pond.

In its fourth flowering season, the Nar Cottage wildflower meadow project has finally come into its own and is becoming a mature, established bio-diverse habitat. At last pinks, purples and mauves of Tufted Vetch and Knapweeds intermingle generously among large clusters of yellow Bird's-foot trefoil, and have started to balance out the till now prevalent whites of Ox-eye daisies and Yarrow which had dominated the last two seasons flowering. A real "purple streak" of wildflower diversity you could say.

The meadow is noticeably lower than the past two seasons and the dry spring and early June heatwave may have contributed to the increase in biodiversity as different plants definitely either struggled or thrived in contrast to the previous two colder and wetter seasons. In addition, Yellow rattle has established itself very well this year and should continue to weaken the competitive grasses in future years.

Every year the flower mix in the meadow evolves and changes to puts on a unique display of meadow flora and fauna. It will soon be hay cutting time, but already I cant wait to see what next year's meadow will be like.

 

Nar Cottage wildlife garden before landscaping work began, early November 2013

Nar Cottage wildflower meadow in late June 2017 with Knapweed and Vetch mxing with Ox-eye daisies

Nar Cottage wildflower meadow in November 2013 - A landscaped area of bare earth and newly filled pond

Nar Cottage wildflower meadow by July 2017 - A diverse mix of pink purple Knapweeds, Vetches plus Trefoils, Sorrel and Daisies

Nar Cottage wildflower meadow in June 2015 - A mass of white Ox-eye daisies but few other flowers - a relatively undiverse habitat

Nar Cottage Wildlife Meadow June 1st 2018 just coming into flower, relatively few Ox-eye daisies are left

Nar Cottage wildflower meadow with cornfield annuals - July 2014

Nar Cottage wildflower Meadow in its early stages of growth - June 2015

Nar Cottage wildflower meadow in its 4th season - July 2017

Of Yellow Flags and Swallowtails

In an unprecedented week that saw the president of the largest Western Great Power turn his back on the Paris Accord to reduce emissions causing global climate change, I took advantage of ironically hot, sunny weather to visit Strumpshaw Fen RSPB Nature Reserve to see one of the UK's rarest and most threatened butterflies, the British Swallowtail, Papilio machaon britannicus.

British Swallowtail, found only in Norfolk, busy nectaring on native yellow flag iris flowers. Taken from at least 1.4m away on a 300mm 4/3 crop OMD.

British Swallowtail, found only in Norfolk, busy nectaring on native yellow flag iris flowers. Taken from at least 1.4m away on a 300mm 4/3 crop OMD.

The trip was an impromptu reprise of my longstanding attempts to enjoy watching this beautiful endangered Norfolk butterfly, which inspired a earlier blog post on my misadventures over several unsuccessful seasons attempting to find them at various Norfolk nature reserves. Last year, I was even interviewed as part of a BBC OneShow item on the native Swallowtail covering the story of a much more famous lepidopterist's longstanding desire to see them.

This time I was hoping for more than a record shot of this rare and uniquely beautiful butterfly, one of only 6 butterfly species fully protected by UK Law since 1992. With the weather so fair sightings had been good all week so I was daring to hope for some natural behavioural shots of it amongst native fenland flora and habitat, rather than perched upon the pretty Sweet William in the renowned Doctor's flower garden.

After a pleasant chat with a Welsh couple now close to completing a multi year hunt to see all of Britain's 59 native species, I had not  ventured far into the reserve before I enjoyed a wonderful encounter of a freshly emerged Swallowtail first basking low down then fluttering up with its ghostlike flight pattern onto a nearby patch of deep yellow flag iris flowers where it began to nectar frenetically. Then the inevitable happened. It was after all Strumpshaw Fen, a sunny Sunday and Swallowtail peak season: The Lepidopteran papparazzi descended.

Within minutes a host of papparazzi lenses, many far too short for the purpose, had surrounded the poor butterfly and their owners, caught up in the viewfinder, became oblivious to both other nature observers as well as the butterfly's wellbeing, and lens hoods started to encroach within inches of where the butterfly was attempting to feed up, blocking out both light and other people. I gently chaperoned and chastised as best I could to create space for the butterfly to feed and all to take turns to see, before moving on frustrated as the crowd grew too big and closed in again around the butterfly.

I reflected on how , perfectly polite people, behind the viewfinder in focussed pursuit of the perfect digital trophy shot, rapidly became so blinkered and oblivious as to unwittingly block our others and even potentially disturb the rare and protected creature they had come to see. I speculated how many had walked right past numerous other fascinating wildlife and flower species without really stopping to enjoy and appreciate them, in their single-minded mission to capture the one famous "celebrity" species. It prompted me to question the drivers behind my own past mission too, though my long lens's minimum focus always helps ensure a respectful distance.

On a bigger scale, it made me contemplate whether charities' tendency to focus on preserving single "blue chip" star species (using gallons of pesticides in the process) rather than untouched habitats is more a help or a hindrance in our efforts to help environmental recovery.

Thinking back to the Paris Accord. I wonder whether it will ultimately ever really be possible for us, collectively as the human species, to overcome our ingrained survival instinct of self interest to do "the right thing" on a big enough scale in time. I hope so. If not, then perhaps our nation's own beautiful custard-yellow Swallowtail sub-species truly is already the ghost it sometimes appears to be, fluttering amongst it's beloved milkweed and flag iris.

Taking off from a yellow flag iris flower, the British Swallowtail butterfly has been fully protected in UK law since 1992.

Taking off from a yellow flag iris flower, the British Swallowtail butterfly has been fully protected in UK law since 1992.

A Late Small Tortoiseshell Summer

At last! Today, a gorgeously golden August bank holiday Monday, I was in Small Tortoiseshell heaven in my back garden with my Olympus 300m lens. With our wildflower meadow newly shorn, I could enjoy wonderful close up views of a late summer brood of Tortoisehell butterflies. They were a beautifully vivid, rich russet-orange colour as they flitted gracefully between the edge of our wildlife pond and our white buddleia, sweeping in to nectar on the pond side water mint. One butterfly cheekily nectared on a water mint flower so close to the water line that it had a narrow escape from becoming dinner with our rather noisy resident frog.

But I’m lucky to be enjoying this sight, because, despite this week's flurry of emergences, today the Butterfly Conservation Society issued a press release about their worrying decline. The Small Tortoisheshell’s population has plummeted by 73% since the 1970s.

Like many butterflies, habitat loss is an issue, but in addition the growing numbers of a parasitic fly, Sturmia bella may also be a contributory factor.

Due to their complex lifecycle, butterflies need caterpillar food plants for their larval stage, as well as nectar from flowers and fruit after they metamorphose into butterflies. Small Tortoiseshells, like several of the nymphalidae butterfly family, use nettles as their caterpillar host plant.

Gardens are increasingly playing a vital role as a habitat in our rapidly changing environment, so if you are a gardener, allowing a generous patch of nettles somewhere sunny at the edge of your garden really could help a struggling butterfly to recover, and when emerging Small Tortoiseshells grace your flower borders, make late summer days in your garden even more beautifully golden.

Silver Sea Lavender Skies

Sometimes muted grey skies can be a blessing in disguise, as was the case with this shot. High contrast full summer light can be tricky to contend with during the day. This soft pastel palette of sea lavender in Holkham bay was only possible thanks to some heavy leaden grey cloud skies creating soft even light conditions. Taken with the new Olympus 300mm pro-lens.

Springtime in der Eifel

Spring has well and truly sprung with a couple of weeks of glorious weather in the UK and the continent. Here a small selection from a short trip to the beautiful Eifel Nationalpark on the German-Belgian border, with lush meadows dripping in springtime wildflowers and vivid dappled green woodland trails bursting with life...

New season's foliage in deciduous woodland on the slopes

Apple tree blossom on a hot sunny circular walk around a 45 thousand year old Meerfelder Maar - a volcanic crater and lake or "Maar".

Wildflowers and butterflies were very similar to those in the UK with cuckoo flower, dandelions, stitchwort and marsh marigolds and dandelions in the downland meadows.

An enticing dappled woodland trail on the Lieserpfad hiking route

In The Bleak Midwinter....

Its January, normally the time of Jack Frost and blankets of white, mittens and snowballs...well not tis year!

El Nino seems to have put paid to all that white stuff in East Anglia for 2016 , which could be one of the warmest (not to mention wettest and windiest!) on record in the UK. 

The mild weather also has our plantlife well and truly fooled, with primroses and daffodils nodding alongside snowdrops and aconites. So, instead of a classic snowy winter's scene, this January's blog is of a winter's walk amongst the silver birch catkins at Narborough.

Nodding catkins, a harbinger of spring still some months away

Evergreen bramble leaves are a welcome sight of green

Winter light has a wonderful glow

A rare blue sky day amidst the brutal sou'westerlies of winter 2016

Mild winters can cause unusual numbers of pests

Lone Pine in Lava Field

I was spoilt for choice in picking December's photo of the month, having enjoyed a repeat festive trip to Cologne Weihnachts Markt (blog followers, the piano man was still there playing) a beautiful walk at Cley beach as well as having a multitude of landscape photos from my second visit to Los Gigantes in Tenerife. Yet it was this simple, stark shot of a lone pine tree in a blasted lava landscape on the flanks of Mount Teide volcano that has stayed with me.

Perhaps because it simultaneously represents both the fragility of nature and its stubborn resilience. The barren lava flow depicts the sheer magnitude of devastation that nature can unleash - despite Man's hubris these are forces well beyond the power of humankind to influence or control. Yet in that small, vibrant splash of green the image also contains a germ of hope. However bleak the landscape may become, nature soon starts to fight back; this young little pine tree is the first tree in a slow process of recolonisation of the lava-blasted the volcanic foothills centuries after the violent 1798 eruption that created this strange landscape.

Hunstanton Sundog

Parhelion at Sunset - Hunstanton, Norfolk

On my last landscape trip I witnessed a truly beautiful natural phenomenon. As I arrived at Hunstanton beach and gazed at the sunset it appeared as if there were not one but two setting suns in the sky, both positioned low on the horizon, the second with a hint of a rainbow-hued glimmer in an arc shape. This optical atmospheric effect is called a parhelion, or sun dog and is one of many types of ice halos  caused by the refraction and reflection of sunlight through small ice crystals high up in the atmosphere. I discovered that the atmospheric conditions had also created the faint sun pillar in the photograph, which is not  caused by a vertical ray of light at all, but by the glinting of many tiny hexagonal-shaped plate ice crystals, the same shape of ice crystals that create sundogs. 

Many thanks to atmospheric optics expert Les Cowley for his assistance in identifying the specific type of atmospheric optical effects I observed and photographed in this image and to the clear scientific explanations provided by his website of the many unusual atmospheric phenomenon  that can be observed by day and night. Click here to see a scientific diagram explaining the optical effects in my image

Meet the Skippers - A Photographic Identification Guide to Skipper Butterflies

Ssshh…Don't tell the Essex Skippers, we're in Norfolk!

These charming, vivid orange little butterflies have extended their range recently and seem perfectly happy living two counties further North than their namesake county. At this time of year they can readily be seen "skipping" amongst the hedgerow flowers and meadow grasses of East Anglia alongside their similar looking cousins, the Small Skippers and Large Skippers, sometimes in the company of the larger meadow  species such as Meadow Brown, Gatekeeper and Ringlet butterflies.

Skipper butterfly identification is a challenge. All three of our most common Skipper butterflies are small, similarly coloured and rather flighty, in fact the Essex Skipper and Small Skipper look so alike that the Essex Skipper was only recognised as a separate butterfly species in 1889. So just how do you tell these three oft-seen Skipper butterfly species apart?

Get a Mug Shot

The surest way to identify and tell the three most common Skipper butterflies apart is to get a photo or good look of the underside of the tips of the butterfly's antennae. The Essex Skipper has very distinctive, inky black antenna underside tips; whereas the similarly sized Small Skipper has orange-brown coloured antennae underside tips. Although the Large Skipper also generally has black tips, its antennae ends are usually more bulbous than those of the Essex and Small Skipper, these two features can’t always be relied on as definitive as they can sometimes vary. The key diagnostic antennae feature to look out for to identify the Large Skipper is that it always has “hooked” or twirly pointed antennae tips, whereas those of both the Essex and Small Skipper are stubby and rounded.

Essex Skipper has black antennae underside tips

Essex Skipper's black antennae tips are rounded or stubby

Small Skipper has orange-brown antennae underside tips

Large Skipper has pointed, twirly antennae tip ends, usually black

Skippers are territorial, living in colonies and can be quite confiding little butterflies when perching or basking. However, as their name suggests, they do have a frustrating habit of zooming vertically off their perch at the slightest movement and skipping off before we get the viewing angle we want, so here are some other perspectives and identification tips.

"Check" out their Wing Markings

The Large Skipper is most readily identifiable from its chequered pattern wing markings. As well as being larger, Large Skipper butterflies appear brighter and more robust than then smaller Essex and Small Skipper butterflies. In contrast both the Small Skipper and Essex Skipper have relatively plain orange wings. Male Small and Essex skippers can be distinguished from each other by their sex bands (see more below). Females are trickier but one other clue to aid separation, though not always a reliable indicator, is that in Essex Skippers sometimes the dark wing edging bleeds up more heavily into the wing veins. Below are two Essex Skipper photos, one with the dark banding radiating into the veins, one without.

Large Skipper's large size and contrasting chequered marking makes it the easiest of the three most common skipper butterflies to identify

Small Skipper basking with wings open

Essex skipper female, sometimes the dark borders radiate along the veins

Large Skipper's chequered wing markings displayed from side on as it drinks nectar with its proboscis

Small Skipper has plain wings when viewed side on

Essex Skipper female basking in evening light

Identifying Skipper Butterflies In Profile

The Large Skipper's chequered pattern is even visible with its wings closed so it should still be readily distinguishable when perching or roosting. Essex and Small Skippers are harder to identify in profile as neither have clear distinguishing marks on their underwings and they are of a very similar size. However, according to Lewington and other field guides, the Essex Skipper's undersides are more straw-coloured than those of the Small Skipper, which may appear more beige or buff. Be especially cautious if using this to distinguish the Essex and Small Skipper, as the look of the underwing can be affected by light conditions and indvidual variations

Essex Skipper has a more straw-coloured underwing than the Small Skipper

Small Skipper has a more buff-coloured underwing (image taken in flat light)

Large Skipper has a checkered pattern visible on its underwings

Use Wing Bands to Identify Male Essex Skippers and Small Skippers

All three male Skipper butterflies have a black gender or scent band line marking on their front wings. This can be particularly helpful in distinguishing an Essex Skipper from a Small Skipper butterfly if you're unable to view them head on. The male Small Skipper has a prominent black gender band that is long and cureved whereas the Essex Skipper's gender band is much less conspicuous, short, straigt and runs parallel to the edge of its forewing.  The male Large Skippers also have very prominant gender bands and at a distance, when fresh from emergence, might even potentially be confused with Gatekeepers due to their vivid orange colour.

Male Small Skipper has a longer, curved, more prominent gender band

Male Essex Skipper has a shorter, straight, inconspicuous sex band that runs parallel to the edge of the wing

A Word of Caution

There is always a degree of individual and regional variation in the markings and colouration on butterflies’ wings and you can find gradual blends between regional variations too. Butterfly markings can also be impacted by the weather while pupating (e.g. extremely hot weather) and fade with age, so sometimes it identification can be a careful process of elimination.

A further peril is only getting a single shot. The camera most definitely can lie, or at least mislead. Sometimes the camera angle or perspective can be deceptive and conceal a sex band or narrow antennae tips. So a diagnostic feature could be present but not necessarily visible. A lack of evidence isnt always evidence of lack, as the saying goes.

This Large Skipper has faint wing markings and its antennae end tips aren’t visible from this camera angle

By way of example, this Skipper was initially mis-identified as a Small Skipper due to a russet brown marking on the end of its antenna and a seeming absence of the twirly hooked end tips.

However a closer inspection after boosting contrast and saturation in the image revealed the very faint presence of the arc of pale checks characteristic of a Large Skipper and a darkened forewing-tip.

It appears that the hooked antennae tips were curling outwards and backwards so from this perspective both were concealed from the camera.

The moral of the story being of course that its always worth getting as many images as you can from as many angles as you can, starting far back at a distance that you know will not disturb the butterfly and moving slowly avoiding sudden jerky movements that will cause the butterfly to skip away. Even if its small in the frame you can always zoom in for ID purposes and discard the image once an ID has been made.

Non Visual Characteristics Can also Eliminate a Suspect

Distribution

Both the Small Skipper and Essex Skipper have expanded their ranges northwards. However, the Essex Skipper is still the more south-easterly of the two species, being seen as far north as the Humber and west to the Severn Estuary. The Small Skipper, like the Large Skipper can be seen even in Wales and Cornwall and as far north as Northumberland recently.

Flight Times

The Large Skipper is the early bird of the three, flying from late May, peaking in mid July and ending in late August. The Small appears next, flying from early June until early September. The Essex Skipper has the narrowest flight period, being seen on the wing from the end of June until the end of August. Bear in mind that flight times can vary significantly by region typically being later further north and also seasonally as butterflies may sometimes take advantage of favourable spring and early summer conditions or respond to adverse conditionas by emerging earlier or later.

Host Plants

All three species are single brooded and feed on various grasses such as Yorkshire-fog (Small Skipper), Creeping Soft-grass (Essex and Small Skippers) and Cock's foot (Large Skipper). Early stage larvae overwinter in the sheaths of long grasses and winter cutting and "tidying" can negatively affect populations. For more information visit www.butterfly-conservation.org

Resources 

My own records and observations in Oxfordshire and Norfolk

Butterfly Conservation Society -  Species Information and Factsheets:

R Lewington - Pocket Guide to the Butterflies of Great Britain and Ireland

All images taken by and © Kiri Stuart-Clarke. All rights reserved

 

Large Skipper nectaring on a creeping thistle

 

© Kiri Stuart-Clarke 2008-2022.
All Rights Reserved.