Tag Archives: #biodiversity

A Murder, A Charm, A Gulp

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A Murder

It must be confusing for wild animals when humans constantly grow so much tasty food, only to try and keep it all to themselves. I see it in my own garden when the various fruits become ripe. All the birds I’ve fed through the winter are suddenly competition for my harvest in summer and fall.

Magpie Lookout – Australian magpie
Artist: Lyn Ellison

I’m not fussed about sharing the cherries, plums, red currants, apples and grapes with the birds. There’s usually more than enough for all of us. But in Australia and elsewhere, vineyards can lose up to 80% of their valuable crop to starlings, rosellas, cockatoos, and thrushes every year.

Until now, common solutions to keeping birds away from the grapes included expensive netting to block the birds from getting at the goods (but which can also make spraying difficult), noisy gas cannons to shock them into flight (but which also sometimes cause fires), and reflective tape, hawk-shaped balloons and recordings of predator calls to frighten them.

But birds can get into and tangled in the netting, and as for noise and shiny or floating objects, as soon as the birds realize they won’t get hurt, they just ignore both.

I’m reminded of a hike I took in Sheffield, England a few years ago, when I saw another bird control solution in the crop fields: Individual crows, dead and hung upside down at regular intervals from wooden posts as literal scarecrows. I don’t know how effective it was on other birds, but the sight definitely kept me out of those tilled properties.

Magpies
Artist: CF Tunnicliffe

A Charm

Maybe with something almost as ominous in mind, researchers at Charles Sturt University in Australia undertook a study at six vineyards in Victoria to see whether aggressive birds could be used to frighten grape-thieving birds from the vineyards.

In this case, the idea was to build observation perches for predatory birds like falcons, who would hunt vineyard thieves, and serve as a warning against hungry flocks.

For whatever reason, the falcons were not seduced by the five-meter high invitations to rest. But another kind of bird was: The mythical magpie. To be precise, the Australian magpie. I should note here that these magpies are not corvids, unlike Eurasian magpies, which are. There’s a great article here for a breakdown on the difference, and why Australian magpies are called magpies.

Be that as it may, over centuries and continents, magpies have been the subject of legends, both good and bad. They’re thieves and harbingers of death; they’re a sign of bad luck if seen alone, but of good luck if seen in groups; in many Asian countries the bird is associated with happiness, while in Native American lore, it’s a symbol of friendship and fearlessness.

For better and for worse, humans have a long-standing relationship with these birds.

Magpies
Photo: TheMagpieWhisperer

It was magpies, rather than falcons, that took an unexpected liking to the high perches in the Australian study, probably because (as the researchers state) the perches provided excellent observation points for the lizards that magpies hunt.

I also read of the winery in South Australia that enthusiastically welcomes the territoriality of magpies in keeping other birds at bay. Their voracity for insects means that they pick out pests from the trunks of the vines, each vineyard row monitored by its own magpie.

 

A Gulp

Some of our favorite science stories are born as the results of research that sets out to find one solution and then finds another.

Researchers who had been looking to attract falcons to vineyards found that vineyards with magpie perches had a noticeable reduction in crop loss to smaller birds. In the study area, this was a reduction from 9% of the crop in vineyards areas lacking magpie perches to only 4% in the areas under the shadow of the tall wooden constructions.

Magpies might not be direct predators of smaller adult birds, but they do eat eggs and chicks of other birds, so that might be one factor as well as their simple threatening presence on the perches.

 

Australian magpies
Artist: Lyn Ellison

Researchers speculate that the falcons might prefer more natural looking branches to the straight perches, so a further study will test those.

Meanwhile, I am wondering what kind of impact these large birds might have overall on populations of smaller birds, insects and lizards in vineyard regions. Do the smaller birds move elsewhere? Do lizards keep down insect populations that might flourish in their absence if the magpies leave?

Viewing vineyards as agro-ecosystems rather than mechanistic crop factories changes the equations in the most interesting ways, this time offering a further strand in our long history with magpies.

There are almost as many terms for a flock of magpies as there are myths about this clever, communicative bird, and doubtless many more eco-interactions than names.

Something to ponder over my next glass of Australian wine.

*A murder, a charm and a gulp are just a few of the collective nouns we use for magpies. Murder is also the collective noun for crows, corvids like the Eurasian magpie.

Common Beauty in the Margins

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I was on a walk yesterday around my running path – a walk, not a run, due to a tumble taken on a mountain hike, and two damaged wrists. One broken, one sprained; a full cast and a metallic brace. It’s slowed me down, but at least I can move my fingers and still type. And I can walk.

The slow pace going around my regular loop was an excellent opportunity to take in some of the smaller sights. There were butterflies, too many for me to photograph in my clumsy phase, but I did get a shot of this little beauty, one of a pair (the other flew off as I crashed along the shoulder of the road).

A female Common Blue butterfly (Polyommatus icarus), no less beautiful for being common.

Photo: PKR

The butterfly’s flower head was in an interstice between the road and an apple orchard, the slender line along the fence posts between the mown grass of the agricultural land and the trimmed green shoulder of the road. These flowering lines, miniature hedgerows, do better now that road maintenance no longer includes spraying herbicides.

As to that name, ‘Common Blue.’ It caused me to reflect on how we evaluate the life around us. Mostly named in times of abundance, many of these species are now less common than they once were. The Common Blue was named back in the 18th century and has been a regular part of the scenery for so long that we might assume its commonness is an unwavering constant.

Sparrows, starlings, pigeons, all disdained by city and country dwellers alike as common in the sense of being ordinary and undistinguished (to the point of being undesirable), are in decline in many regions. In some cases, the population loss has been precipitous and sudden.

Kind of like my mobility. Something I usually took for granted until I found myself in a completely new and uncomfortable situation in the blink of an eye.

As for the Common Blue, it seems to be a robust and adaptable species that is anything but common in its lovely colors and grace. As long as it continues to find sustenance in the margins, it might do just fine.

Swift Moment

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A cloudless evening and the shrill cries of a small group of European swifts on an evening hunt for insects.

A summer concert told in sharp notes.

The swift has a wide range and enough numbers to be merit a population status of Least Concern from the IUCN. Considering the slow but persistent declines in common birds such as house sparrows due to habitat loss, it’s good to see a familiar bird adapting to changing circumstances.

The old farms in our French village all have ledges placed between the beams of barns for to support nesting birds (and to keep the floor beneath somewhat cleaner), a nice old habit that made space for wildlife in a way that modern garages and houses don’t.

Our own garage is still open and has old beams, home to several swift nests every year. Seeing them whisk in and out of the buildings at breakneck speeds is a thrill that never gets old.

A few of the many ledges for nests in the barn next door.
Photo: PKR

 

I found this interesting clip on the extreme lifestyle of the European swift – it can stay aloft for up to ten months of the year, and naps while gliding. Swifts might be common, but they are very special.

Summer Field Moment

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I was out running yesterday and there was a cushion of sound, a papery hum, that accompanied me for a long stretch.

At first I thought it was the standard ambient noise of my run: a bit of mountain wind, shards of birdsong, maybe an underlying rush of water from the creek in the middle of the nearby forest (but only if it’s just rained). And then there’s the busy road at the lower end of our village, and the occasional plane above. It’s a familiar palette.

But this was closer, and I was pounding along and breathing heavily, so the soft crackle carpet of this sound took a while to push through to my awareness enough to make me stop and take a detour into the neighboring field.

I should have known all along. A field of rowdy insect song, full of hidden animals drunk on the heat of a summer morning.

So I thought I’d share it.

Root Migration

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What do a rare high-altitude Alpine snow flower and a sturdy South African cousin of the daisy have in common? They aren’t related, they look nothing like one another, and they are natives to completely different habitats in different parts of the world.

But over the past few years, they have both been on the move.

Rockfoil – Saxifraga androsacea
Source: Wikimedia

The saxifrage species, also known as rockfoil, is a tenacious ground plant with that waits all winter under snow cover before bursting forth with a graceful stalk and small blossoms. It’s a plant of extremes – extreme cold, extreme altitude, it thrives in rocky soil where little else grows. But the temperatures for which it is adapted are becoming more seldom, and with them, so is the plant.

Meanwhile, the South African ragwort (Senecio inaequidens), a tall herbaceous plant with bright sunny blossoms, is happy to take up the space. Able to survive higher temperatures and unfussy about altitudes, it is adapting well to Alpine heights. The ragwort’s seeds arrived in exports of South African wool, and are proving very comfortable in a number of regions across Europe and the rest of the world.

South African ragwort – Senecio inaequidens
Source: ResearchGate

According to a long-term study of one Italian region, Alpine winters are rapidly becoming warmer, up to 1.2°C (2.16°F) over the past 20 years, with tourism and skiing heading ever higher in search of winter sports, impacting the environment. And while both tourists and ragwort are happy at a variety of altitudes, saxifrage is running out of places to go.

What the two plants share mobility, but are separated by the extent of their comfort zones. With climate change, the ragworts will settle in, the saxifrages will be unsettled. Whatever other plants or animal life that relied on an ecosystem that includes this little saxifrage species will change along with its disappearance.

It’s a sign of profound transition that a plant native to South Africa is growing on Alpine rock faces. What we know of this ancient landscape as it has always been will have to be altered.

For the moment, the plants have movement and terrain in common. Their destinations, however, won’t be the same. One will likely adapt and move onwards, the other will likely move into memory.

Rockfoil
Photo: Florasilvestre

All Abuzz

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A friend challenged me to take nature photos for a week, and it resulted in several very nice shots of our garden, if I do say so myself.

But one of the most enjoyable aspects of the exercise took place when I went to take pictures of the two lavender bushes in front of our house. I planted them a few years ago, replacing ones that had gotten woody and sparse. These two bushes are veritable pollen engines, and the air around them is usually humming.

Photo: PKR

But it was only when I leaned in to take photos that I realized just what a busy miniature ecosystem these two plants have become. There were at least three different bee species in addition to the humble honeybees I usually see there – unfortunately, I couldn’t get all of them to pose for me. Several of them kept insisting on harvesting from lower branches, out of easy camera range.

And then there were the hummingbird hawk moths, the closest thing we have here in France to hummingbirds, at least in terms of size, movement and preferred food source.

Hummingbird hawk moth (Macroglossum stellatarum).
Photo: Wikipedia

There were several other small pollinators, flitting black creatures I couldn’t catch on camera, as well as wasps, which I left alone. And then there are the lizards that lurk on the stone wall and the countless birds in the branches of the climbing vine, all waiting for an easy meal.

Photo: PKR

All this around two lavender bushes, a small world on our terrace. One more argument, if any were needed, on the value of planting for pollinators, even in limited spaces.

Photo: PKR

Pieces in the Mosaic

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Over the past few decades, we’ve grown used to campaigns imploring us to save one animal or another. Usually the photogenic or impressive species. Save The Whale, Save The Panda, and so on. Shortly after the United States’ Endangered Species Act was passed in 1973, a case came along about a modest creature, the Tennessee snail darter. In keeping with its unprepossessing name, this innocuous little member of the perch family became famous for getting in the way of a construction project, the Tellico Dam.

The snail darter wasn’t considered glorious enough, in and of itself, to be a contender for ‘Save The’ status. And if the Endangered Species Act had been passed unanimously in the Senate and 390-12 in the House of Representatives, the snail darter showed the limits of congressional commitment. There were those who correctly saw that the movement to save the snail darter was not a campaign for a single species, but for an ecosystem at the expense of an infrastructure project.

Fish, Roman mosaic.

Republican Howard Baker of Tennessee argued at the time that “the snail darter has become an unfortunate example of environmental extremism, and this kind of extremism, if rewarded and allowed to persist, will spell the doom to the environmental protection movement in this country more surely and more quickly than anything else. (…)we who voted for the Endangered Species Act with the honest intentions of protecting such glories of nature as the wolf, the eagle, and other treasures have found that extremists with wholly different motives are using this noble act for meanly obstructive ends.”

This type of hierarchical perspective – the attitude that some animals are more noble, more glorious, prettier and thus more worthy of protection than others because we are impressed by them in some way – is one of those markers of humanity that trips us up time and time again. It’s typically human to not see the forest for all the trees.

It’s hard to imagine in this automated age, but let’s try to picture the mosaic of a human city as an ecosystem brimming with different species. Let’s insert activities and services in that world in the place of species, which often perform ‘services’ in their ecosystems.

St. Stephen mosaic, Askalon.
Source: Kingdom of Jordan

And at some point, some of the smaller activities start to disappear. Flower shops, say, or soap manufacturers, winemakers. Not disastrous, but not ideal. We miss the soap quite a bit, and the wine, and we give up decorative bouquets.

And then maybe a few bigger activities. Gas stations. Grocery infrastructure. Clothes shops. Coffee growers. We can still function and adapt, but life isn’t what it was. And then maybe a few big ones. Banks, grain growers, water infrastructure maintenance, cell phone towers. Electricity generators.

If we acknowledge that our society needs most of its parts to fully function, why should it be any different for the individual species of a given ecosystem?

The Lod mosaic.
Source: Espoarte

It’s been decades since various laws, treaties, and organizations were formed around the world to protect the environment, from the IUCN (The World Conservation Union) to CITES (Convention on International Trade in Endangered Species of Wild Fauna and Flora), and yet for the general public, species preservation is still by and large perceived as a one-off undertaking.

We are only beginning to understand the role that species play in the mosaics of their ecosystems, even as they are going extinct at the greatest rate since the Cretaceous era 66 million years ago. Meanwhile, as we insist that our human ecosystem is has more value, we are losing up to 140,000 species every year.

We imagine societal dystopias all the time in books, movies and games. We don’t even know what the ecosystem we call home will look like as we move further through the Anthropocene extinction event currently underway.

So do your bit. Support endangered species movements and campaigns. Saving a species, even something as ‘lowly’ as a snail darter, means a lot more than just saving a pretty face.

I wrote this for International Endangered Species Day – but it’s equally relevant for International Day for Biodiversity. Obviously.

And if you think that’s too many days to think about biodiversity, conservation, endangered species and extinction, my response would be: it’s 363 short of how many days these issues are of relevance to each and every one of us.

 

*Note: The snail darter is now considered ‘vulnerable’ after a few more small populations were found elsewhere in Tennessee. The economic impact of the Tellico Dam has not been assessed.

Running Evensong

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The bad news today was that I spent most of it trying – with the assistance of an electrician and a building contractor – to figure out why the electricity in our house kept going off for no apparent reason. One of those unnerving household events that I’d almost rather attribute to a poltergeist than to an impossible-to-locate shorted cable buried somewhere in one of the stone walls of this old pile we call home.

My morning run got delayed past noon, and then past evening, and then it was nearing sundown.

The good news today was that when I finally got out for a run, the air was still warm and fragrant with the scents of cut grass, the sweetness of wild flowers that line the roads, and this, the evening chorus of birds.


The run was also punctuated by cowbells, low sunset calls between free-range cattle, a carpet of amorous crickets, and the occasional whoosh of large mourning doves flying past.

The lights in the house are back on, but that’s not what recharged my batteries.

Failed Elver Balance

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As the season comes to an end for harvesting the young American eel known as elver, I thought I would revisit a topic I’ve often written about on ChampagneWhisky. The American eel was once a remarkably abundant marine animal along the eastern seaboard of the United States and Canada. Along with its close cousins, the Japanese eel and the European eel, it was so plentiful in coastal waterways that people could go out with pillowcases and easily fill them with eel.

The American eel was a staple of early Colonial life, and was the main dish served at early Thanksgiving meals. Japanese eel was so popular that it was fished to near extinction in the 20th century, and the same holds true for the European eel.

Father William balances an eel on his nose from Alice in Wonderland.
Illustration: Charles Folkard

These days, elvers are fished in a very limited number of locations, during a short season – transparent, around the size of an earthworm, they are sold by the pound for shipping to aquaculture facilities in Asia. The appetite is large, the supply of local eel all but decimated outside of fish farms.

It’s not just the overfishing that is putting this mysterious animal at risk around the world. Habitat loss in the form of compromised river ways, climate change, pollution that affects reproductivity, barriers like dams or hydroelectric plants that block the progress of eels and elvers to their traditional grounds.

In Maine, where elvers represent an annual revenue of around $10 million (not counting the lucrative black market, of course), elver fishermen who hold the highly coveted and non-transferable licenses are, on the average, over the age of 50. There’s concern that their skills and knowledge won’t be transferred if the licensing process isn’t opened up to include younger newcomers via lottery.

Father William balances an eel on his nose from Alice in Wonderland
Illustration: John Tenniel

In the United Kingdom, fishing for the critically endangered European elvers is highly restricted, and patrols try to control any poaching.

Here’s my question: All three major eels used for human consumption are classified as endangered on the IUCN Red List, or in the case of the European eel, critically endangered. These animals have complex life cycles that still hold a large measure of mystery – they breed and spawn in the ocean, they return to rivers and lakes to grow. This complex process is one reason they can’t simply be farmed like some other fish.

They traverse thousands of miles in ever smaller numbers, and if this year’s catch included 600,000 elvers, that’s half a million fewer than will now be able to keep their species alive through all the other threats.

Glass eel, unpigmented elver, post-larval stage of the American Eel (Anguilla rostrata)
Photo: G. Verreault/Gov’t of Canada Species at Risk Registry

With all due respect to the fisheries along the eastern coast of North America, to the revived fisheries of the UK, to the aquaculture of Asian countries, maybe it’s time we lost our appetite for eel, at least for a while. Let’s grow other industries, other appetites, other revenues that aren’t carried out on the sinuous backs of ancient animals.

We think we can balance our relationship with the eel – but this won’t last.

Let the ageing fishermen of Maine record their knowledge, let the practices fade until they can, perhaps, be revived if and when the eels return.

Felling Heritage

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People used to intimately know places like the Bialowieza Forest, the last primeval forest in Europe, the wild places that made us what we are.

Now these place are relegated to small corners. They mainly inhabit our stories, little bits of baggage we carry with our culture through the millennia.

Traveling Landscapes.
Artist: Kathleen Vance

Spanning the border between Poland and Belarus, the Bialowieza forest is home to the Europe’s tallest trees and is a refuge to countless species of birds, mammals and invertebrates. Although not unaffected by war, especially during and after WWI when most of its native bison were exterminated, the forest has remained largely intact and untouched for over 10,000 years.

This is the kind of mixed forest and rich ecosystem that once covered most of Europe, and this last remnant of 140,000 hectares (540 sq. m.) was declared a Unesco World Heritage Site in 1979.

It’s a living museum piece, a sprawling natural monument to the world as it was when humanity was young.

Traveling Landscapes.
Artist: Kathleen Vance

Now that humanity is more mature, we have nation-states and borders, and the forest that was once a free-roaming thing is considered the territory of one place or another, whether or not UNESCO, or the European Union, or environmental activists, consider it to belong to all of humanity and the world.

In this case, the fact that some of the Bialowieza Forest is on the Polish side of an international border is critical. After decades of protection and management, the Polish government approved a massive increase in logging in the forest. This logging would go far beyond forest management activities meant to control pests or promote growth – 180,000 cubic metres (6.4m cubic feet) of wood over ten years.

Bialowieza Forest.
Photo: Emily Sun

Ignoring arguments put forth by environmentalists, scientists, universities, NGOs and a petition signed by 160,000 Polish citizens, the Polish government won a victory this week in a court challenge that would have granted environmental NGOs the legal status to challenge decisions made by the Polish Environment Minister, and to demand further environmental impact reports.

The next step will be charges brought by the European Union and possible sanctions for the violation of Poland’s agreements under the Natura 2000 program.

But, as with all such procedures, these things take time. And any pristine area where logging commences is an area that will be irretrievably altered. Bit by bit, what was a rampant cathedral to pre-humanity wildness becomes a memory, a smaller place, diminished by our hunt for resources and the money they bring.

Will the Bialowieza Forest become just one more living place packed away and stored our collective human memory?

Traveling Landscapes.
Artist: Kathleen Vance