Dragonflies, info request

Published in Forum items

Can anyone help with information about dragonflies on Hvar?

Dragonfly Dragonfly Steve Jones

Steve from Dol has sent us the following query by email on 23rd September 2016:

'Do you know much about dragonflies on the Island?

Over the Summer I have seen several and I know Norman nearby has also seen similar.

While I know a few of the more obvious ones I am puzzled, one thing I do know is that they like water in which to lay. The dragonfly life cycle is for the most part spent underwater and they only emerge as what we see towards the end of their life and to mate.

I am puzzled as to where they can possibly lay eggs, I only know one source of water down near the airfield and I don’t believe from there they would travel up to Dol. I often think they could be laying in the numerous wells/water storage places in the field but most are covered and I don’t know how they would emerge. One species described to me was the Golden Ringed Dragonfly and this as I read likes fast flowing water so I even more at a loss.

I was down near the airfield yesterday and several of just two species that I could tell were flying the one species tended to be flying joined to his mate, there were several of these

Didn’t know whether or not you can shed any light on this for me? I know of someone in the UK who specialises in Dragonflies, I may email him and see what comes of it.'

Eco Hvar's reply, 23rd September 2016:

Yes, actually there are many more sources of water than you'd think, off the beaten tracks, but also in the fields.

One of Hvar's 'secret' pools. Photo Vivian Grisogono

A lot of the enclosed wells have open basin on top,which can be home to all sorts of insects, including water snakes. Unless the fields around the wells have been doused in herbicide of course. There was a superb little water snake in the open part of the well by my field one year. It would curl itself round and round very lazily, right up to the time the basin went dry. I was afraid 'my' snake had died, lying there quietly, but it then discreetly disappeared, re-appearing a cuple of times in the grass above the well, presumably looking forward to the winter rains which would replenish its basking place. 

Talking about herbicide, did you see that the sale of Cidokor/Roundup is to be banned from October 1st, together with 12 other glyphosate-based herbicides? Good as far as it goes, but it still leaves 12 other glyphosate herbicides on the market!

We''ll look forward to hearing the results of your dragonfly investigations. A good place to see them is in the environs of Humac, where there are some lovely natural pools where the horses and some hunting dogs drink and butterflies abound, as there are no poisoned fields in the vicinity.

You are here: Home forum items Dragonflies, info request

Eco Environment News feeds

  • Thousands of protesters occupied bridges across the Thames over extinction crisis in huge act of peaceful civil disobedience

    Eighty-five people have been arrested as thousands of demonstrators occupied five bridges in central London to voice their concern over the looming climate crisis.

    Protesters, including families and pensioners, began massing on five of London’s main bridges from 10am on Saturday. An hour later, all the crossings had been blocked in one of the biggest acts of peaceful civil disobedience in the UK in decades. Some people locked themselves together, while others linked arms and sang songs.

    Continue reading...

  • Scientists in Brazil find first evidence of plastic pollution in Amazon basin freshwater fish

    Scientists have found the first evidence of plastic contamination in freshwater fish in the Amazon, highlighting the extent to which bags, bottles and other waste dumped in rivers is affecting the world’s wildlife.

    Tests on the stomach contents of fish in Brazil’s Xingu River, one of the major tributaries of the Amazon, revealed plastic particles in more than 80% of the species examined, including the omnivorous parrot pacu, herbivorous redhook silver dollar, and meat-eating red-bellied piranha.

    Continue reading...

  • Cuadrilla won’t say if it has halted Preston New Road exploration, at cost of £94,000 a day

    The shale gas firm Cuadrilla has refused to confirm whether it has halted fracking after triggering a series of minor earthquakes near Blackpool, raising questions over the operation’s future prospects.

    Dozens of small tremors have been registered near the company’s Preston New Road site, after it started pumping high volumes of water undergroundin October to explore for gas.

    Continue reading...

  • Starlings over Rome and the ‘smiling angel’ of the Yangtze are among this week’s pick of images from the natural world

    Continue reading...

  • Huge expansion of agri-food industry is harming environment, say investigators

    Green energy subsidies are fuelling the rise of poultry mega-farms across Northern Ireland, with owners accused of contaminating sensitive habitats with emissions from chicken faeces.

    An alliance of agri-food companies enlisted the support of Northern Ireland politicians to unlock an estimated £800m in subsidies for contractors. This has paved the way for industry expansion at the expense of the environment, according to an investigation by the not-for-profit journalism group SourceMaterial.

    Continue reading...

  • In the last 30 years, gulls have come among us as never before. But is their moment coming to an end as we tackle our waste problem?

    When was the last day you didn’t see a gull? Throughout Britain we ordinarily cross paths with these birds more often than with any other wild creature. They are hard to avoid. In the last 30 years – the lifespan of a large gull – they have come among us as never before. Though still popularly regarded as seagulls, many have moved inland, far from the seaside or saltwater. They have adapted to life in many places we have made, and they have thrived.

    Cities and their hinterlands where we jettison our rubbish now sustain far more gulls than the birds’ former more traditional marine habitats. Indeed, in a paradox that might define the Anthropocene era, surviving coastal birds are now regarded as threatened with local extinction, while the same gull species in urban areas are so prevalent they are thought of as pests.

    Continue reading...

  • Ranking of countries’ goals shows even EU on course for more than double safe level of warming

    China, Russia and Canada’s current climate policies would drive the world above a catastrophic 5C of warming by the end of the century, according to a study that ranks the climate goals of different countries.

    The US and Australia are only slightly behind with both pushing the global temperature rise dangerously over 4C above pre-industrial levels says the paper, while even the EU, which is usually seen as a climate leader, is on course to more than double the 1.5C that scientists say is a moderately safe level of heating.

    Continue reading...

  • ‘The two things I love most are novels and birds, and they’re both in trouble,’ says The Corrections author, one of the world’s most famous birdwatchers

    Birdwatching was once an activity that elicited a sense of mild shame in Jonathan Franzen. The author stalked New York parks with binoculars in hand, rather than on a strap, carefully hiding from view the word “birds” on his field guide. Debonair friends in London recoiled in horror when told of his pastime. Franzen was furtive, almost embarrassed. Now, he is one of the most famous birdwatchers in the world.

    “I totally let my freak flag fly now,” Franzen says as he scans for birds at a community garden near his home in Santa Cruz, California. His phone has an app that deciphers bird sounds. He travels the world to see recondite species. He has written about birds in essays, op-eds and novels.

    “I was so socially unsuccessful in my youth and such a pariah in junior high that I really didn’t want to look like a dork,” says Franzen, the 59-year-old author whose best known works include The Corrections and Freedom. “I got over that. The success started to make me think: ‘Hey, it’s not me who’s got the problem.’”

    Continue reading...

  • Undersea forests, bleached and killed by rising ocean temperature, might disappear in a few decades, experts warn

    Children born today may be the last generation to see coral reefs in all their glory, according to a marine biologist who is coordinating efforts to monitor the decline of the world’s most colourful ecosystem.

    Global heating and ocean acidification have already severely bleached 16 to 33% of all warm-water reefs, but the remainder are vulnerable to even a fraction of a degree more warming, said David Obura, chair of the Coral Specialist Group in the International Union for the Conservation of Nature.

    Continue reading...

  • In the latest from our series on biodiversity, the Blue Hill chef says we’ve got sustainable agriculture wrong. It’s not a question of sacrifice, but deliciousness

    “How does it taste?” says Dan Barber, regarding me expectantly in the garden of Blue Hill at Stone Barns, his restaurant in the Hudson Valley just north of New York. I am gnawing the crust of a large piece of bread that has been grown from Barber Wheat, a hybrid seed developed by Barber and his partners to be nutrient dense, high in yield and – a radical thought in seed breeding, apparently – full of flavour. (Whereas clapped out old seeds might yield 30 bushels an acre, Barber Wheat will stretch to 95). The bread is simultaneously light, and dense, and intricate in flavour in such a way that I can’t think of a single word to do it justice. Barber, who at 49 has the manic energy of someone for whom no plate of food will ever live up to the ideal in his head, looks at me gloomily. “That’s the whole problem with food writing,” he says.

    There are bigger problems in the food world. With the possible exception of “financial regulation”, there can be few more deadly phrases to the casual reader than “sustainable agriculture”, a heavy-weather issue most of us recognise as increasingly important but nonetheless killingly dull. This is where Barber, who set up his restaurant in 2004, is hugely persuasive, a charismatic leader who, if you talk to him for an hour while walking around the kitchen and bucolic surroundings of Stone Barns, will have you genuinely excited about crop rotation, and soil conditions, and the fact that the food industry is a dying behemoth reliant on low-yield, agronomically risky seeds that produce ever more tasteless and nutrition-less food.

    Continue reading...

Eco Health News feeds

Eco Nature News feeds