WALKING ALONG THE TOLKA AS IT RUNS THROUGH GRIFFITH PARK RECENTLY, I WAS PLEASED TO SEE A GREAT VARIETY OF WILDFLOWERS GROWING ON THE BANKS.
All were within a stretch of a few hundred yards.
There were other flowering plants too but either had already flowered or were yet to do so.
End.
Diarmuid Breatnach
(Reading time: 6 mins)
The adolescents took off then, a great host of them, amidst great excitement. Their pheromones, male and female, filled the air around them and those who could, which was most of them, quickly found a partner and coupled.
It was a maiden flight from which the adolescent females would land no longer maidens. Those who would land, that is. For suddenly the air was filled with giant flying monsters with huge eyes and giant whirring wings.
Much more accustomed to flight, these monsters flew among them, gobbling them up. Some even held rows of their hapless victims in their huge beaks as they flew off to feed them to their young. Hundreds, perhaps thousands of the little flyers perished in minutes.
Those who managed to land safely and didn’t end up drowning in a lake or a river, or snapped by denizens of the deep who sprang up at them as they passed overhead, or caught in sticky webs, or who were not stamped carelessly to death by huge walking giants or flattened by roaring, stinking monsters, still had to contend with smaller predators on the ground. The casualty rate was huge but some made it alive – some always did.
The males who made it down to ground safely would all die within a couple of days. Their wings were only intended for their nuptial flight; on the ground, they were nothing more than a nuisance, impeding their progress over and underground.
The females, sexually sated and no longer interested, had left their male partners behind. They bit off their own wings, ate them and, quickly finding some reasonably soft ground, began to dig.
Each one dug down as though her life depended on it, which of course it did; and not only her own life – each one was pregnant. Then she blocked the entrance to her tunnel, went back down it, excavated a chamber and began to lay eggs.
It was completely dark down there but she had been reared in darkness – she had one day of daylight only, the day she flew.
The young grubs who hatched were all females. She supplied them with some sparse nutrition from herself and cared for them as they grew, shed skin, grew … until they spun a cocoon from which they emerged as very small worker ants.
They were infertile workers and tended to their large mother, their Queen; even when they were fully-grown she was still one-and-a-half times their size, although about half the size she had been when she left her old nest.
Her most recent meal had been her own wings the day she had flown and mated. If she got past this crucial stage, she would recover her size and weight and lay more and more eggs.
The workers soon went up the tunnel, unblocked it and spilled out into daylight for the first time in their lives, beginning to forage for food. They found small seeds and, if they were lucky, sweet material such as soft-skinned ripe or rotting fruit.
They soon had their surroundings covered with their hive-scent, carried by each and every worker. Sometimes they found insects they could kill but these had to be very small indeed – these workers had been fed on insufficient nutrition and were, compared to the majority of their kind, puny.
If they found a food-source worth another visit, they left a specially-scented trail on their way back to their home, to guide theirs sisters back to the prize later.
A rich source of food typically would show two streams of traffic between their nest and the food – one empty-jawed heading for the food and the other, with pieces in their jaws, heading away from it and towards the nest.
The food gathered by the workers fed them and their Queen, while she continued laying eggs. As time went by, more and more workers were born, who would care for the hundreds of eggs their matriarch laid and raise more and more workers. Extensive tunnel networks were dug.
At some point the workers found aphids and began harvesting their sugary secretions; tending them on the stems of the plants the aphids infested and carrying them down to their citadel but bringing them back up later. The workers would fight to protect the aphids from those who preyed on their ‘herds’.
Successive generations of ant workers grew bigger, until they reached the optimum size of five millimetres (still four millimetres short of the Queen in her prime). A well-established citadel could in time house as many as 40,000 individuals (although between four and seven thousand would be more common).
They, and previous generations, are all daughters of the same mother and the product of one mating only. Their Queen, barring unusual disasters, might live to 15 years of age.
Once the citadel is built, it is vulnerable in the ordinary course of things only to parasites, flood, fire and severe surface disturbance. In Ireland, without bears, wild boar and largely without foraging pigs, severe surface disturbance is unlikely away from human construction or ploughing and digging.
Fire might not reach underground but the heat generated or the lack of oxygen might kill anyway; flood, of course, would be the biggest threat.
If a citadel should be uncovered or invaded by flood waters, some workers will rush to deal with the problem while others rush to save the young, trying to carry eggs, pupae or cocoons away in their jaws to a safe place. Some others will rush to do whatever they can for their Queen.
A black ant defends itself by running away if possible and if not, by biting. But intruders to the citadel are swarmed by biting ants. However most human skin is impervious to the bite and this species does not sting.
One day, perhaps three years from the Queen’s maiden flight, she will decide it is time to send her own children into the wider world. She will lay eggs and have these emerging grubs fed special food, which will produce males for the first time in her citadel, as well as other fertile females besides herself.
Then, one day in July or in August, she will send them out too, to start new colonies.
Lasius niger, the Black or Garden Ant, is the most common of the 21 species of ant in Ireland. It is the most common also across Europe and a sub-species, L. neoniger, is known in the USA where however, it is not one of the most numerous ant species.
Lasius niger is a very active, hardy and adaptable species, living mostly outdoors under rocks and but rarely inside houses (although it may well enter houses repeatedly if it learns of food within, especially sweet food).
In cities, its nests are to be found in parks and gardens but also under street paving stones, the workers emerging to forage from tunnels leading to the joints between the stone. When those joints are surrounded by thin lines or small heaps of bright sand in summer, one knows that the workers are clearing the tunnels for the adolescents’ flights.
Another indication is an unusual amount of seemingly erratic ant activity around a nest, though one would need to be aware of what normal activity looked like, for comparison.
The ants may delay, awaiting what they judge to be optimum conditions but someday soon, mid to late afternoon, they will take to the air, to fly, to mate, to die or to live, to start a new population.
End
Diarmuid Breatnach
(Reading time: 2 mins.)
On my way to Griffiths Park in the Glasnevin-Drumcondra area on Monday I stopped to gape at a glitter-storm above the street. They were flies, dancing in the sunlight, the slanting light reflected off them. In the Park itself through which the Tolka flows, I saw many more clouds of them, always in patches of the early evening sunlight. These were the Mayfly or Cuil Bhealtaine. I took photos but my phone was unable to capture their true beauty, coming out in the photos more like snowflakes.
At one point I was able to observe a cloud of them at closer distance. They didn’t all just fly around haphazardly – every now and again individuals would dive down like a meteor – the sun making them seem as though they had a burning trail — and then zoom up again. On and on they went and it amazed me that no birds or bats seemed to be preying on them.
A poem or a piece of music might have done the sight justice.
UNDERWATER LIFE
The mayflies rise from their larval stages underwater only to procreate, to open their wings and fly, then to mate and to lay eggs into the water. They cannot eat as they no longer have mouthparts and individuals that are not seized and eaten by other life-forms have at most a couple of days to live.
A great many life-forms, especially invertebrates, spend their youth in the water and rise to mate. Dragonflies and damsel flies do so – a return to ancient mother water for some, perhaps. Long ago the cetaceans – whales and dolphins – ‘returned’ to sea and evolved to adopt to it, limbs converted to fins and tail. Penguins did the same, wings becoming flippers. And mayflies are quite an ancient life form too.
As a child and into my early teens I would spend hours by a pond or other stretches of water, looking at what I could see of the animal life there, also sweeping a long-handled net through the water and bringing my assorted catch home to examine in jars or basins of water.
The larvae or nymph stages of water-laying flies comprised a large part of the collection: midges, gnats, mosquitos, rat-tailed maggots, stoneflies, bloodworms and also the larvae of the dysticus beetle (handle with care!). These and more shared the murky waters with daphnia and rotifers, leeches and planarian worms, water-mites, frog and newt tadpoles while water-scorpions, water-measurers, pond-skaters and water-margin spiders prowled the surface above like pirates.
In clearer water such as streams and rivers, I caught sticklebacks while caddis fly larvae inside their home-made tubes imitated drowned twigs.
But I don’t recall ever seeing mayflies and certainly never saw a hatch like this. No doubt trout anglers have seen the like often for such mass ‘hatchings’ are a bonanza for them. From boat or land they cast out their lines with articifial flies attached, hoping the trout rising to snatch at the mayfly harvest will grab the false fly instead. These hooks with bits of feather or fibre tied around them don’t look like a fly to you or me but sitting on top of the water and seen from below, they must look good enough to eat.
ON THE WAY BACK
There was more to see, like the mallard duck with her clutch of chicks or ducklings but the intervening branches made a photograph impossible. In shape and colour the new ducklings remind one of bumblebees and they zip around on the water without difficulty and fearless. Alas, they have a high attrition rate as seagulls and herons will each take them as a snack.
Looping around on my walk I passed by the closed Botanic Gardens looking great in the sunset but I had to stalk the view from the side to get a shot clear of the scaffolding inside and signpost outside in front.
On the bank of the Royal Canal on the home stretch a heron was standing close to the path but I delayed too long getting my camera ready so it became uneasy and began to move off. Further along, a swan couple kept their cygnets close, just a couple of days old at most, balls of grey fluff – Anderson’s “ugly ducklings”.
But the day’s prize for me was undoubtedly the clouds of mayflies in their glittering dance in the sun.
End.
SOURCES/ FURTHER READING
Ireland: https://www.irishexaminer.com/opinion/columnists/arid-20333849.html
In general: https://en.wikipedia.org/wiki/Mayfly
Diarmuid Breatnach
(Reading time: 3 minutes)
The last weeks of May and first half of June saw the young of many species take to air or water. On my walks in the Drumcondra area of Dublin where I live, although Glasnevin Cemetery and the Botanic Gardens were unreasonably closed (the Botanic is now open but on restricted hours, again unreasonably), the banks of the Tolka river in Griffith Park and the banks of the Royal Canal were open to the public.
A pair of mute swans (ealaí) nested on the stretch of Royal Canal east of Cross Guns Bridge but quite near to it. Well, the female, the pen, at least did, while the cob (male) was usually swimming nearby. So how did the pen feed during the long hatching period? Unlike some bird species, this male does not feed the broody female. Well, the male may take a turn, spelling her to go off and feed herself and difficult to know when that happens, as both genders look so much alike. Fumbling with my phone once I failed to catch a photo of the large grey eggs beneath the shifting body of the sitting bird – three, an East Asian woman told me, using her fingers. Later, I saw both parents with just one cygnet – whether some of the eggs were infertile or two of its siblings died I don’t know.
(Photo: D.Breatnach)
(Photo: D.Breatnach)
Predators can take cygnets but the parents are very good at protecting them and eggs in the nest will not be left untended until the cygnets are hatched – and then it’s straight into the water. When not swimming itself, the cygnet climbs on to a swimming parent’s back and sits there surrounded by a natural feather duvet. From then on, the nest is not needed except perhaps in stormy weather.
A few days later I was fortunate to see another pair of mute swans on the Tolka in Griffith Park, these with no less than seven cygnets! Their parents took them upstream, the cygnets swimming easily, even under the branches of a fallen tree-trunk. Until they came to a mini-weir which the parents simply walked over but their offspring were too small to do that. However, they maintained position for quite a while swimming against the mini-waterfall, their parents seemingly unable to understand why their young could not follow them and, eventually, having to turn back to them. Many mammals, confronted with a similar problem, would simply pick its young in its mouth and carry them over the obstacle and then go back for the rest. A small crowd of Homo Sapiens mammals gathered to watch the proceedings with interest and delight.
(Photo: D.Breatnach)
(Photo: D.Breatnach
(Photo: D.Breatnach)
(Photo: D.Breatnach)
Also out with their young were mallards (Lachain), the ducks and drakes (bardaill). Some had hatched their young as far back as April but most seemed to be doing so at this time period and then it’s straight into the water. I remember witnessing the unpleasant scene of a duck with a clutch of tiny ducklings on the Tolka being harassed by a couple of drakes, one in particular trying to mate with her, she quacking that she wanted no part of it. Contrary to comment by some writers, rape is not unknown in the animal world and though in most species it is rare, mallard drakes are known for it.
Delightful it was however on another day to see a newly-hatched clutch of ducklings zooming around on the water, in their fluffy chocolate brown-and-yellow down looking like aquatic bumblebees, both parents close by.
(Photo: D.Breatnach)
Walking past the high waterside vegetation of the canal one day I heard a kind of cheeping which I guessed to be the chicks of a moorhen (Cearc Uisce). These waterfowl are very shy and careful too not to reveal their nest locations which are constructed in waterside vegetation only inches above the water level and sometimes actually afloat on a kind of raft. Though egg-laying is in March-April and they will not fledge until about 50 days later, we should be seeing the chicks with their parents already. So where are they?
(Photo: D.Breatnach)
Grey herons (Corr Ghlas) fish the Tolka and the Royal but their nests are nowhere there. They prefer to nest in trees, somewhat incongrously for birds with such long legs. I have never seen their nests in Ireland myself, though I read that a colony is to be found in St. Anne’s Park, in County Dublin. Grey herons take turns on the nest and also in feeding their young – which require a lot of fish and frogs. They would take a duckling or cygnet too, given the chance …. Which is why herons often get mobbed by other birds. In Drumcondra I watched one on house rooftop being dived at by seagulls, no angels themselves but they have nests of their own in higher rooftops nearby.
(Photo: D.Breatnach)
And one day, a Little Egret (Éigrit Beag) spent a little while looking for fish in the Tolka before departing. It’s a relatively new settler in Ireland but no longer rare along the east coast.
Not so much “taking to the water” as already in it are the tiny young of the three-spined stickleback (Garmachán), hatched out in underwater nests cared for only by the male. I have seen shoals of the fry of larger fish in the Tolka too, once heading downriver through the Botanic Gardens; what species they were I don’t know but a large stock of brown trout (Breac Donn/ Rua) lives in the river. Many sprats are at this moment concentrated in different parts of the Tolka.
However, on a number of occasions large numbers of fish have been killed by pollutants in the water. A few years ago it was reported that salmon (Bradán) had been seen making their way upriver and this year I saw some myself in the Tolka. These spawn in freshwater and after a few years their young make their way to the sea, the survivors returning years later to spawn in the river again. If the young are killed before making it into the sea obviously they won’t coming back to spawn in a few years’ time so a fishkill incident in one week can wipe out a species in the river for a number of years. I photographed the sprats of some species of fish a few weeks ago in the Tolka and again this week while walking through Griffith Park (I, not the fish).
Among the young taking to the air now are those of the magpie (Snag Breac) and the distinctive and irritating high-pitched calls of the juveniles can be heard just about everywhere, usually from above in the trees. The call is “feed me” and is designed to be difficult to ignore. However, they need to learn not only to fly but to find their own food, so the parents will feed them only on occasion. This corvid is apparently an invader recorded arriving in Wexford in 1676, over two decades after that other invader, Oliver Cromwell. It has settled in well but is recognised as a predator by songbirds and sometimes attacked by them; on the other hand the magpies themselves will gang up on seagulls, hooded crows and cats, when they will give a frequent rattling kind of call.
The juveniles who are calling to be fed were in the egg for 20 days and fledging for nearly a month, which means the eggs were laid in April. The nests are large, a mass of twigs and can be seen in trees all over Dublin.
(Photo: D.Breatnach)
(Photo: D.Breatnach)
Royal Canal, Drumcondra; Yellow Flag Iris nearby.
(Photo: D.Breatnach)
The young of plants have taken to air too and along the banks of both the Royal Canal and the Tolka the flowers have died and are turning to see-capsules or to pods, while other species are bursting into flower.
Some days the ground was covered in drifts of a kind of cotton and I assumed this was seed-carrying material. But from what? Along the Royal I might suspect the bullrush or reed-mace, with tattered tufts of cotton around the mace “head” …. or perhaps the pussy willow … but surely not in these quantities? However, in Griffith Park clumps of it were drifting across my path and I remembered reading about “cottonwood trees” in stories set in the “Wild West”. Yes, three species of cottonwood are part of the larger poplar family and have been around for 55 million years in North America, Eurasia and Asia and although not native they do grow in Ireland. And poplar-type trees have been planted along stretches of the Royal but in particular in Griffith Park, recognisable by their somewhat rounded leaves and the compact upright growth of their branches, so perhaps they are the source of the cotton? Their name in Irish is Poibleog Mheiriceá Thuaidh, translating as “North American Poplar”; that’s a bit of a long one and if they become more popular (forgive the pun) we might have to start calling them ‘Crann Chadáis’ (Cotton Tree).
But it wasn’t them either. The culprit was, after all, the willow (Sail) tree; but not the pussy or weeping willow, but the giant willows.
End (A Chríoch)
Diarmuid Breatnach
(Reading time: 7 minutes)
The week before last I saw my first dandelion of this year in bloom in Dublin. On a cold, dark and wet day, it had its sunny bloom shining on a bit of waste ground. And not far from it, a coltsfoot (Tussilago farfara) in bloom too, a relative in the same genus sometimes confused with the dandelion, also in bloom. But this is the story of the ubiquitous dandelion, which we knew as “Piss (or Wet) the Bed”, from a mistaken belief that keeping the blooms in one’s bedroom would make one void one’s bladder while sleeping.
We have two common species of dandelion in Ireland, T. vulgaris and T. officinalis, Caisearbhán and Caisearbhán Caol Dearg (?) respectively in Irish. They belong to the genus or larger family of Asteraceae, one of the two largest genera of the flower family, including so many species, from the diminutive daisy to the giant sunflower.
It is an important early source of pollen and nectar for insects in this latitude, when not many other blooms are about.
The name “dandelion” is a rendition of the pronunciation in French of “dents de lion”, i.e “lion’s teeth”, said to refer to the serration of the leaves reminding people of lion’s teeth. Well, perhaps of a cartoon or heraldic lion, or one as imagined by Europeans who had never seen the animal.
As the season progresses, soon those cheerful yellow blooms will be seen everywhere, on roadside verges and waste ground, in gardens and fields, in woodlands, on hillsides ….. Except in bogs and strangely in some parts of the Burren1, there is hardly a place where it cannot be found, which makes us see it as common and perhaps view it with disdain.
But it is far from being an everyday plant.
As children, we thought to tell the time by blowing on the fluffy balls that develop from the bloom in late Summer or Autumn, each puff being an hour and the correct time being the number of puffs to blow the last seed parachute away. It seems unlikely such an impractical idea would have occurred to us and we only did so because we had been told about it by adults.
But there is some wonder in those fluffy balls, full of separate parachutes, each bearing one seed. This is possible because what I have been deliberately calling a “bloom” rather than a “flower” is, properly speaking, a capitulum, a head actually containing many, many little flowers, or florets – and each one of those will bear a seed. It is a wonderful arrangement capable of producing a multiplicity of seeds even if parts of the bloom are damaged.
Each floret grows a silky “parachute”, the plant not only using the wind for seed dispersal (as do grasses with pollen) but developing such a means of delivery to cover great distance.
Upon hitting disturbed ground or even a crevice with soil, the seed takes quickly – the dandelion’s children are great opportunists — and sends down a long taproot, while above ground, leaves grow in a rosette shape upon rosette, later sending out hollow stalks that will bear the bloom of florets. Each bloom “responds to changes in light, in fine weather stretching the florets to the sun and following its course across the sky, or closing the head up as soon as rain threatens, opening also for sunrise and closing at evening.”1 As the florets die, their bracts close and the seeds and parachutes develop inside; then their surrounding bracts drop, allowing the expansion of the full ball of silky parachutes – i.e the maximum possible number of seed-carriers.
When the seeds have gone with the wind, the hollow stem dries up and falls away. The tap-root regularly shrinks and pulls the rosette of leaves tight to the ground: maximum absorption of sun and moisture but also maximum possible cover on ground, making it difficult for other plants to compete close to it.
Unless I dreamed it, somewhere I came across a phrase and image that I considered very democratic but have not been able to find it since. I had thought it spoken by a Shakespearian character but no search has turned it up. As I recall it, a worker or person of “low” social status says that his blood is as good as any royal person’s, for “a king on the march scatters his seed like a dandelion”!
To the average flower or vegetable gardener, the dandelion is an invasive noxious weed, rapidly colonising newly-dug, hoed or even raked soil and competing with what it is desired to grow. And the fact that hoeing the leaves off even a couple of times will not kill the plant, the root sending out new shoots, makes it worse. Using a rotavator chops up the tap root but many of the resulting sections can regenerate and start a new plant.
All this is amazing enough, were it not for the plant’s sex life – or absence of it!
Most flowers, blossoms and blooms exchange pollen, usually with the assistance of pollinators – generally insects and in particular, bees. This fertilises the plants and causes the production of seeds, whether in the form of fruit or nuts or just plain “seeds”. The shape and colour of the bloom attracts the pollinator, knowing that inside there is nectar and pollen to be eaten (or collected, in the case of bees).
Well, dandelion blooms contain nectar and are visited by many insects, including bees – but the plants don’t exchange pollen in order to produce seeds. They produce the seeds alright, as we have seen – but asexually. Without sex. So why produce blooms and nectar at all?
Each new plant is a copy of the parent but no breeding occurs. Another mystery: there are a huge number of different microspecies of dandelion, differing in sometimes minute ways from one another and living and seeding in the same general area (more than 70 in Co. Dublin alone3). ‘In the British Isles alone, 234 microspecies are recognised in nine loosely defined sections, of which 40 are “probably endemic.”4
Let’s imagine an ancestral dandelion plant – how did it come to produce all these micro-species, seeding true but each separate and without cross-breeding? Botanists don’t seem to know: ‘the humble dandelion is, indeed, as the new Webb’s An Irish Flora confirms, “a very difficult genus”, its flowers not always to be told apart, even in the hand. The American ecologist Paul Ehrlich once described the reproductive policy of dandelions as “perhaps the greatest mystery in the world of plant sex”.‘ 5
All over Europe and Asia the plant has been known for culinary and/ or medicinal qualities but rather than just quote hearsay and unverified publications, I prefer to pass over most of the detail of these alleged qualities as the subject requires more research than I am prepared to undertake at this time.
All of the dandelion plant is edible1, except perhaps the bloom-stem: root, leaves, buds and blooms. Which is probably how this native Eurasian plant came to colonise America (though North America does have its own native species too) – brought there as a culinary plant by European colonists. The green leaves are likely to be too bitter for many tastes unless blanched first – i.e covered to deny them sun for a week or so, when they will turn yellow and lose much of their bitterness but still remain crisp.
(Photo sourced: Internet)
Dandelion wine has been made from the flowers (a gallon of flowers for a gallon of wine7, but some other ingredients must be added, as with all European plants with the exception of the grape or the gooseberry). A mildly-fermented drink, dandelion and burdock8, has also been made from a combination of the dandelion flowers and burdock roots.
(Photo sourced: Internet)
The flowers have also been dried, then ground into a powder to make a light yellow dye but I lack information on its colourfastness.
The white sticky liquid (latex) in the stems and along the main rib of the larger leaves has been said to remove warts but having tried it myself without success I doubt this claim. Furthermore, I believe the remedy may be confused with a similar-looking white sap from a completely different plant, the petty spurge (also known as “milkweed” and other common names), Euphorbia peplus, which I have found efficacious. However, the white sap in the dandelion has been developed by selective cultivation in one species to replicate the latex of the rubber tree9 and dandelion rubber may one day become a familiar product.
Soon, this seemingly ubiquitous flower of many “cousins” and many uses, an opportunist colonist with thousands of daughters sailing the wind, will be brightening our ways everywhere. Once we know even some of its qualities, can we ever again look at the dandelion with disdain?
End.
1In New Atlas of British Irish Flora, quoted by Michael Viney, “Pissey beds lion’s tooth” etc (see Sources, References)
2Ibid, also Taraxacum – ‘A very difficult genus of a multitude forms, which set seed without pollinating, and never, therefore, interbreed.’ An Irish Flora by D A Webb, Sc.D. 1977, quoted in Wildflowers of Ireland (References, Sources).
3Ibid.
4 Stace, C.A, New Flora of the British Isles, quoted in Taxacum (References, Sources)
5Michael Viney, Irish Times (References, Sources)
6Taraxacum (Sources, References)
7Michael Viney, Irish Times (References, Sources)
8Not the commercially-produced and carbonated drink
9Taraxacum, ‘As a source of natural rubber’ (Sources, References)
https://en.wikipedia.org/wiki/Taraxacum
In Irish: https://blogs.transparent.com/irish/blath-bui-eile-an-caisearbhan-dandelion-in-irish/
http://www.wildflowersofireland.net/plant_detail.php?id_flower=86
Petty Spurge as cure for warts (and variety as cure for skin cancer): https://en.wikipedia.org/wiki/Euphorbia_peplus
rebelbreeze 