Photo Blog

I blog about nature in the Norfolk countryside and about my wildlife garden.

Purple Loosestrife and Autumn Copper

Small Copper butterfly nectaring atop a Purple Loosestrife flower

One of the most spectacular, for me almost magical, wildlife gardening plants I’ve discovered in my project to create a wildlife-friendly garden is Purple Loosestrife.

Purple Loosestrife grows in a dense cluser on pond and river edges. Its foliage and flowers support a variety of long-tongued pollinators

These butterfly photos, probably my last of 2019, a quickly grabbed series of a Small Copper butterfly, Lycaena phlaeas, frantically nectaring on swaying Purple Loosestrife flowers by my wildlife pond on a sunny but very blustery mid-September’s day, illustrate perfectly why it is such a wonderful wildlife-friendly plant to grow.

Gardening Value

Purple Loosestrife, or Lythrum salicaria to give it its botanical name, is a native perennial, widespread across the UK. In the wild it inhabits a range of damp habitats including river edges, marshes and pond margins. The wildflower works well in gardens because its height and colour have a strong impact, making it visually impressive in the way that relatively few other native wildlfowers are.

Its almost exotic-looking flowers are formed of tall rosettes of rich magenta-pink petals and it enjoys a long flowering period from June until well into September. Salicaria refers to the willow-like, elongated oval shape of its leaves and its red-hued stems can be striking in their own right, adding height and structure to a pond margin. Purple Loosestrife is easy to grow, being a vigourous plant which can grow up to a metre and a half tall, often in quite dense colonies and tolerates a wide variety of soil types. It establishes easily, so much so that in North America it has become designated an invasive species, and has a reputation and status similar to that of Himmalayan Balsam here.

Elephant Hawkmoths use Purple Loosestrife as a caterpillar host plant and have magenta markings

Wildlife value

Purple Loosestrife is a particularly useful nectar source for a variety of long-tongued insects; not just butterflies and bees, but also hoverflies and moths, including several hawk moth species. Its prolonged midsummer-into-autumn flowering period means Purple Loosestrife can serve pollinators as a nectar source both through the “June Gap” as well as supporting later emerging and second brood insects, such as Small Copper butterflies well into early autumn when many other nectar sources such as meadow flowers have vanished with the haycut and harvest.

Being a UK native wildflower, it is also favoured as a caterpillar host plant by several moth species including the Elephant Hawk-moth, Willowherb Hawkmoth and the Powdered Quaker.

Plant folklore

Its main common name suggests one of its many herbal uses may have been to “loose strife” and historically it was also used medicinally to help gastric upsets, fevers and dysentry. Lythrum comes from the Greek word for “gore”, again referencing its vivid flower hue. Alternative names for Purple Loosestrife include “Blooming Sally, Bouquet Violet, Grass Polly, Purple Willowherb, Purple Lythrum, Salicaire (its French name), Red Sally, Soldiers, Spiked Willowstrife, Stray by the Lough (Ireland) Swaggering Sally”. A red dye and food colouring used to be made from its vividly coloured flowers and its tannins have been used to preserve ropes or wood from rotting in water.

Small Copper butterfly in profile seeking nectar rich Purple Loosestrife flowers

Small Copper butterfly amidst swaying Purple Loosestrife flower spikes

Small Copper using its long proboscis to nectar on Purple Loosestrife

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.

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

Blackberrying Butterflies

Comma butterfly feeding on blackberry.jpg

We tend to think of butterflies as nectar drinkers, but in fact their diet varies significantly by speces, and also by season. At this time of year as the blackberries ripen on brambles, many species especially hibernating Nymph butterflies like this Comma butterfly (Polygonia c-album are as partial to a bit of blackberrying as you or I!

 

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