Happenings

There has been some serious renovation work at Cabragh Wetlands over the last few weeks. Walkways have been strengthened, with renewal of wooden sections over ditches and boggy footpaths, and many barrow loads of stone flattened down to make wandering around the wetlands both safer and drier. Many thanks to those who gave up their time to help get the work completed.

Of greater importance to the natural habitat has been the start of a programme to clear excess silt out of the pond and to get more oxygen and life back into this very important habitat. The easiest way to capture the interest of young children visiting the wetlands is perhaps to trawl a net through the bottom of the pond and tip the captured species into a tank for detailed closer inspection. The appearance of water boatmen, pond skaters, leeches, caddis fly larvae with their extraordinary cases, backswimmers and so on, will evince both shrieks of surprised delight and sudden silence which shows that the attention of the child has been caught and that for once they are really thinking about the implications of what they have encountered. That is education.

What is hidden is always so much more intriguing than what we can see. Most plants, birds, mammals and insects are familiar and in danger of being boringly mundane to many. What we drag from the dark depths of the water, be it pond, river or sea, is very often exotic and strange. Its features are new - frightening to the young, yet compelling to those prepared to study and compare it with what they already know. It’s all about the wonder and awe of nature, and dissemination of that is a large part of the educational role of the Cabragh Wetlands Trust.

So let us give more thought to what which we cannot see and do not experience. There have been a number of important global research projects recently which have focussed on trying to find, identify and catalogue the many species that are as yet unknown to western science. In the dense forests of Papua New Guinea, species have been able to evolve in small isolated communities cut off in steep-sided valleys. In a two month survey in 2009 over 200 new plants and animals were found, including 24 frogs, nine plants, 100 spiders and almost 100 other insects. The white-tailed mouse, orange frog, the tube-nosed fruit bat and a white flowered rhododendron are among many species entirely new to us.

It would have been awful if we had wiped them out before we had found them. Now we know they exist, let us hope that something can be done to save them. That means reducing our pollution, controlling tourism and construction, preserving forests and other habitats, keeping the growth of human populations under control, and learning to think differently about the natural world and the place of humankind on the planet, living by models other than the profit motive and accumulation of monetary wealth.

Tipperary Biodiversity

We have an exciting new venture that we hope will attract a lot of public use. To help you enjoy and understand the wealth of biodiversity around us, a website has been set up that will help us all to recognise and appreciate the species we encounter. Over time the natural biodiversity of our landscape is changing, and we want to keep track of what is happening. We would like to receive pictures and news of what you have seen, where and when you saw it, what it was doing, what it was feeding on, and so on.



If you go to our website (www.cabraghwetlands.ie) you will find a link to Tipperary Biodiversity. Alternatively try tipperarybiodiversity.blogspot.com/. There you will be invited to download your pictures of animals, plants, insects and birds, and if you have no picture, then leave a comment about what you have seen or want to find out. This is a great way to get help from other users to identify what you cannot recognize, or ask questions on the blog which someone out there in the cyberworld will surely be able to answer.



It is early days, but the site already contains more information and pictures on the marsh fritillary butterfly which we wrote about two weeks ago. There is a request to identify an unusual spider that someone found on the wall of their house, and an answer. A hairy white caterpillar has been photographed, posted on the blog and identified as a Pale Tussock moth larva (there’s a new one to most of us).



Most interesting of all, a Vapourer moth has been pictured. The comments tell us that it has to be a male, because the female is wingless. Our writer tells us that he found a colourful and distinctive Vapourer caterpillar feeding on willow late in September, took it home to show the children, and then, when going to release it, found that it had begun the next stage of its lifecycle – the cocoon phase. Leaving it where it was, he awaited its hatching. This Sunday (10/10), a wingless adult female Vapourer emerged.



She can scarely move, swollen with eggs and waiting for a male to fertilize her. She appears to have no function other than to produce eggs and propagate the species, and as she has no wings, she hardly has an independent life. Using the scent of pheromones, she can attract males, so smell can be seen as a language, a means of communication. After her eggs are laid, she will die. The eggs will overwinter before hatching in batches from March onwards. As the female cannot fly or move more than a few centimetres, the dispersal of the species and the joining of different clusters to ensure genetic diversity are entirely dependent on how far the caterpillar can walk from the pupating site. Not surprisingly it is very localised and relies on its habitat suffering no sudden changes of the type that man in his wisdom is wont to cause. Birds and other predators will give wingless moths and fragile caterpillars a hard enough struggle to survive without human damage to their habitat.



Use the new blog to post pictures, ask and answer questions, add comments and advice, and give extraordinary creatures like the Vapourer moth a little more chance to survive.

Deaths Head Hawkmoth

As with almost every other life-form on the planet, butterflies (17,500 species) and moths (163,000species) are under real pressure. Around the world many species have become extinct; as always the biggest reason is habitat destruction, which means that once again the finger of blame has to be pointed at human activity. Forms of life that can be traced back in the fossil record over 400 million years are threatened by a species that in perhaps just 10,000 years has grown to exert a very dangerous form of control over much of the environment.



Pictured here is the Death’s Head Hawkmoth, common around the Mediterranean, North Africa and the European continent, but rare in Ireland. Recently there have been sightings from Cork City to Inishowen Peninsula, Co. Donegal. One must suspect that the warming climate is bringing it to pastures new. It is a most distinctive moth, with that extraordinary skull design on the back of its thorax giving rise to superstition that seeing the moth was a potent of death or serious misfortune. The Death’s Head Hawk-moth cannot feed from flowers because of the shape of its proboscis, so it instead raids beehives and uses its strong little tongue to stab into waxy cells and feed on the honey.



Their distinctive streamlined bodies make them very quick fliers, reaching 30 mph (hence the name hawk-moth), and the larvae (caterpillars) feed on potato, deadly nightshade, verbena and olive plants. An endearing feature is that when threatened the moth will give out a totally unexpected loud squeaking noise to deter predators. Local entomologists are hoping to establish whether it is present in Tipperary. Have you seen it? Pictures will be most welcome. It is a very large moth, with a body 2.5 inches long and a wingspan of 4-5.5 inches, likes cultivated and lowland. If you keep bees you might be lucky enough to see one. Please let us know.