Tuesday, June 23, 2015

Tortworth Arboretum

By Bruce McDonald

With just a few days to go before our trip to Tortworth, on Sunday 31 May, the weather forecast was dire - would it go ahead? In the event the weather relented and we enjoyed a day at this amazing arboretum led by the irrepressible Tony Titchen, an ideal guide for this collection as he had been involved with the identification and cataloguing of the trees in the past. We had invited members of our other groups and were delighted to be joined by representatives from Bristol Naturalists, Gloucester Naturalists and Friends of Dyffryn Gardens.


For those unfamiliar with the location, the arboretum is in the grounds of the Tortworth Court Hotel near Wotton under Edge and a convenient 45 minute drive from Cardiff. There is plenty of history to this place as Tony pointed out. As far back as Edward I's reign (1272 - 1307) the manor of Tortworth belonged to Sir Nicholas Kingston. The Veel family held it for 200 years when it included a deer park; then the Throckmortons and finally the Ducie family who owned it for 350 years. The house itself was built between 1849 and 1853 by the 2nd Earl and was designed by Samuel Teulon. During the Second World War the building was used first by Royal Navy as a training establishment when it was referred to as HMS Cabbala. Next, American servicemen took up residence and it was at this point that some of arboretum trees were lost due to the spillage of vehicle oil. In 1991 the house was bought by Phillip Stubbs but a disastrous fire caused widespread damage. The structure was then purchased by Four Pillars Hotels and their restoration is what you see today.


And now to the purpose of our visit: the arboretum itself. Whilst some mature trees predate the arboretum it was the 3rd Earl who started planting in 1853 and created an arboretum which at the time was a rival to Westonbirt. Our tour started with a Robinia pseudoacacia (below) but this was the contorted form 'tortuosa'. Robinia originates in the Eastern and mid-Western USA arriving in Europe in the 17th Century.


Then a Blue Cedar, Cedrus atlantica, the form 'glauca' of the Atlas Cedar from the Atlas mountains of Morocco and Algeria. Tony pointed out the characteristic short needles which contrast this cedar with most others. And then a massive Southern European Plane, Platanus hispanica, often referred to as a London Plane. The girth was impressive although, as with many of us, the bulk had shifted downward in old age.

A Dawn Redwood, Metasequia glyptostraboides, followed, discovered in China as recently as 1941. This can be confused with the Swamp Cypress, Taxodium distichum, alongside which it is often planted but a simple key is the opposite foliage of the Dawn Redwood and alternate of the Swamp Cypress. The first Champion tree to grab our attention was a Nikko Maple, Acer nikoense with distinctive trifoliate leaves.


A Shagbark Hickory followed (above), Carya ovata, from North America, and one of 7 different species but distinguishing them can be tricky. However it usually (but not exclusively!) has 5 leaflets whereas the Mockernut and Shell-bark Hickory - the other two with large leaves - usually have 7.


An Oriental Spruce (above), Picea orientalis, was obligingly sporting some cones - Tony reminded us to look out for the unusually short needles on this tree. Many of the trees were supporting Mistletoe including species which were quite unexpected such as the Red Oak, Quercus rubra. A stream marked a valley fault line with acid soil to one side and the other alkaline, helping to enable such a wide variety of tree species to flourish.
 
 
Although the rain had held off Tony marched us under the umbrella-like cover of a Crimean Pine, Tilia euchlora, making it a perfect place to shelter from adverse weather (above). A Common Walnut, Juglans regia, provided Tony with an opportunity to use his penknife test to reveal the interrupted pith in the twigs. And a close relative of the familiar Sycamore and similar in appearance was Van Volxem's Maple, Acer velutinum var. vanvolxemii. - a rare tree coming from the Caucasus in the late 19th century. Under it were hundreds of small seedlings - a propagation opportunity if ever there was one. Another rarity followed, Chinese Zelkova, Zelkova sinica, with orange-pink bark.
 
 
Next, and sporting the largest leaves we were to see on a tree that day, was an Amercian Lime (above), Tilia americana, and yet another rarity, although it was discovered in North America as far back as 1752. The photo illustrated the size of the leaves as the ruler help alongside was 30 cm or 12 inches long.

Tony took great pains to describe our next tree as the Tree of Juda, Cercis siliquastrum, and not the Judas Tree although it is commonly called the latter. A tree originating in what might loosely be called Judaea is a more logical name than yet another of the many varieties of tree on which Judas is supposed to have hanged himself. Distinguishing this from the not dissimilar Katsura is helped by the fact that the Katsura has opposite leaves and the Tree of Juda alternate.
 
 
Sophora japonica was next in line with the common names of the Pagoda or Scholar's Tree. This has similarities with the Robinia that was the first tree on our quest although the latter usually has spines and round-tipped leaflets. An American Blackjack Oak, Quercus marilandica (above) took us nicely up to lunch. With most of our brains and notebooks full to overflowing, how might we cope with the afternoon session?
 
 
After a brief pause and cup of tea in the hotel for some we assembled around what must be one of Tortworth's crowning glories, a mighty Caucasia Elm, Zelkova carpinifolia (above). The photo was taken in December and shows the scores of stems twisting up from the ground. Another unusual feature was that the suckers around the base had been trained to form a protective hedge.

The umbrella form of a Pendulous Beech, Fagus sylvatica var. pendula allowed ample scope for the whole group to assemble within its protective canopy (above), before we moved on to a smaller tree with prominent spines, Aralia spinosa, commonly known as the Devil's Walking Stick (below).
 
 
Next, an English Oak, Quercus robur, but this was an uncommon variety with variegated leaves. And as if we had not already encountered a plethora of rare trees our next specimen is described as 'very rare' and this was the Chinese Cork Oak, Quercus variabilis, with, as the name suggests, thick, corky bark.
 
 
 
A Willow-leaved Pear, Pyrus salicifolia (above), was showing off some of its small, inedible fruit but our final meeting was with a small tree or large bush that many will have encountered, the Corkscrew Hazel, Corylus avellana var. contorta (below). However this one was different from those that most of us will have come across as it was an 'original'. The story goes that it was first discovered in a hedgerow in Gloucestershire and the 3rd Earl of Ducie was a recipient of one of a number of plants propagated from suckers and distributed to private collections. The Corkscrew Hazels that are available in garden centres at modest cost will all have been grafted as the bush will not grow true from seed or cutting. It also has a popular name, Harry Lauder's walking stick supposedly because the great music hall entertainer often appeared with a crooked walking stick.
 
With our thirst for trees now well sated our gentle stroll back took us past a pets' cemetery (below), a tunnel of Wisteria (below) and a pudding stone to be greeted by a lively, colourful and exuberant Indian wedding taking place at the hotel.
 
 
Our thanks, as ever, to our guru for the day, Tony. If you are tempted by this and love trees why not pop in and wander round the grounds. The hotel will not mind but note that dogs are not allowed. Next year we are planning a return trip to Pontypool Park with Tony as our previous visit was largely washed out. Watch this space for details.
 
 
Text and all photos: Bruce McDonald







 



 
 
 
 

 

Friday, June 19, 2015

Peterstone Super Ely

The 25th of May turned out to be a wonderful day for a walk with friends

We went on a route picked out by Rob and Linda Nottage around Peterstone Super Ely

The wildlife abounded in the late spring sun and we were treated to a nice selection of habitats to wander through

The birders amongst us watched out for life as we crossed the river, but I failed to spot anything moving that fast. However I did find some Green Dock Leaved Beetles (Gastrophysa viridula) so engrossed that they did not care when I turned their leaf over.

She's heavily expecting so soon the  larvae will be turning the leaves into something that looks like a fine lace doily. I suspect the small brown pile behind them is exactly what it looks like - frass is the technical term
 


We wandered along the riverbank and spotted this nice mature Horse Chestnut (Aesculus hippocastanum) or conker tree to the young at heart. This part is overhanging the river so whoever collects these will need to be careful


Oh well when they've had enough exercise collecting the conkers they can rest on this well placed bench 


No good for us though, so we headed from the riverbank into meadows and were soon admiding many wildflowers. Whilst the rest of the team were marvelling at Monkshood I was admiring this Comfrey (Symphytum officinale)


 And a nice yellow Flag Iris (Iris pseudacorus) looking cheerful in the sunshine


And on to open landscapes where we hunted in vain for Sand Martins. not a good show this year, we hope they all found somewhere nice to nest. 


The whole of this flood plane is covered in the most wonderful meanders. Its not possible to do them justice in a picture taken at ground level.  Hmmm  I wonder if can I get permission to drive my land Rover here as a photo platform?


Others were making proper records of what they saw, but I hope some like this simple photo diary of my day out

Excellent company, excellent wildlife, excellent landscapes

Regards
Andy

Monday, May 11, 2015

Mary Gillham talk by Andy Kendall in Penarth - 21 May 2015

FLAT HOLM SOCIETY PUBLIC TALK
“ONCE YOU HAVE SLEPT ON AN ISLAND”
THE LIFE AND WORKS OF MARY GILLHAM
Born in 1921 she was one of the leading naturalists in Wales.  After gaining her doctorate in agriculture and botany at Aberystwyth University, she specialised in island ecology, studying the Welsh islands before moving on to lecture in Britain and abroad.  She was one of the first women scientists in Antarctica and worked on penguin islands in South Africa.  From 1961 she lectured at Cardiff University leading field trips in Britain and abroad, and was a lifelong supporter of Flat Holm.
A talk by Andy Kendall of Cardiff Naturalists' Society
 
To be held in Room 3, The Kymin, Beach Road, Penarth
Thursday evening at 7pm, May 21st 2015
Suggested donation towards costs of £2/£3
 
www.flatholm society.org.uk                  Help save Flat Holm          
 
 
 
 
 
 

Tuesday, March 24, 2015

Wallace and Svalbard

You may be forgiven for thinking what's the link between those two as there isn't (to the best of my understanding) any record of the great Naturalist Alfred Russell Wallace going to the frozen north, in fact he's more famous for his trips to the Amazon and the Malay Archipelago

The simple fact is that we had two talks last night and the title reflects the subjects of them both

Julian Carter of the National Museum of Wales led off with his personal account of how he had learned about Wallace during the design and build of an Exhibition that was on at the museum and is now. From the description of that exhibition
On his death 100 years ago, Alfred Russel Wallace was widely praised as the 'last of the great Victorians'. But who was he?
Wallace was many things - an intrepid explorer, a brilliant naturalist, a social activist, a political commentator – overall a remarkable intellectual. In his time, he collected over 125,000 animal specimens, published more than 800 articles and wrote 22 books.
Wallace is most famously associated with co-discovering the process of evolution by natural selection alongside Charles Darwin. Yet we have all heard of Darwin, whilst Wallace has become more of a forgotten figure.
It seems to me that Wallace had a fascinating (if at times stressful) life and contributed to many things such as mapping and surveying the world in addition to his seminal work on evolution.

Joan Andrews one of our past presidents then talked to us about a trip to Svalbard that she and another of our past presidents Tricia Woods took in 2014 and showed a range of photographs of the various wildlife that she had encountered. I was impressed by how close they had been able to get to some Polar Bears, Walrus and many of the birds, and wish I'd been there with my camera

That was the last of our indoor meetings for the season so we will be focused on going out and seeing some wildlife across the summer whilst our 2015/16 programme  is developed - look out for it towards late summer, but please come back here and also take a look at, and join in the other information sources we have on-line and try and join us at one of our outdoor events

Facebook https://www.facebook.com/groups/CardiffNaturalists/
Twitter https://twitter.com/cardiffnats

Wednesday, March 18, 2015

Neil Price: Hemiptera: The Real Bugs

Dr Neil Price, an entomologist working for David Clements Ecology Ltd, talked to the Cardiff Naturalists’ Society on Tuesday 17 March 2015 about the Hemiptera. This order of insects is also known as the true bugs.  They are characterised by distinctive and elongated mouthparts, designed for piercing and sucking. They mainly feed on plants, but many species are predatory.

We were introduced to a number of bug families within the sub-order Heteroptera. There were some familiar shield bugs, an ant-mimicking mirid bug, seed bugs, and bed bugs. Bugs can have distinct smells and can often be noisy (stridulation). Neil recommended an online identification guide for the identification of British Hemiptera: http://www.britishbugs.org.uk/

There are a variety of ways to survey for Hemiptera: sweep nets, pooters, beating vegetation over trays, light traps, and large expensive-looking vacuum-cleaner devices. Neil has recently been involved in sampling Hemiptera on brownfield sites (land altered by human activity, especially post-industrial areas). These areas are increasingly being recognised as important for wildlife, and may be home to around 12-15% of Britain’s rare insects.  Brownfield sites have micro-habitats favourable to many insects, including bare loose substrates, short vegetation and scrubland.

Survey work on four brownfields sites within Buglife’s West Glamorgan Stepping Stones project revealed a diverse range of Hemiptera.  Neil talked about the species encountered on four of the five West Glamorgan brownfield sites: Pluck Lake in Swansea (25 species), and Bryn Tip (19), Cymmer Coal Tip (21), and a site within Tata Steelworks (14), in Neath Port Talbot (NPT). The project is monitoring invertebrates, reptiles and plants and aims to restore and manage a total of 48 hectares of brownfield habitat.

Finally, Neil told us to be on the look-out for the Western conifer seed bug (Leptoglossus occidentalis), a large invasive squashbug species from North America that feeds on pines. It was introduced into Europe in 1999, and is spreading along the south Wales coastline.

You can report Western conifer seed bug findings here: http://www.nonnativespecies.org//factsheet/factsheet.cfm?speciesId=1964

Buglife's West Glamorgan Stepping Stones project:
https://www.buglife.org.uk/campaigns-and-our-work/habitat-projects/west-glamorgan-stepping-stones

Wednesday, March 11, 2015

Track a Tree

An invite from our friends from the North... 

Merthyr 

click on the poster for a larger version 


Tuesday, February 17, 2015

In Search of the Wildcat

At last night’s (16/2/2015) meeting, Chris Hatch gave an illustrated talk about the wildlife of the Scottish highlands. Chris is a self-employed ecological consultant based in South Wales, who works as a wildlife photographer and as a world-travelling wildlife tour leader. He is part of the Wild Media Foundation, a company that uses photographic images to draw attention to nature conservation issues.

Chris started his photographic tour on the high mountains of the Cairngorm National Park, with ptarmigan and arctic hare. These hares are killed in large numbers by gamekeepers in the highlands, because they can pass on tics to grouse (hunters pay up to £1,000 per day to shoot grouse on the big estates). The moorlands below the peaks were the setting for spectacular images of merlin, hen harrier, black grouse and other wildlife.

We detoured to the Moray Firth, to look at seals, bottlenose dolphin, puffin, gannet, artic tern and other seabirds; accompanied by interesting facts on the threats some of these species face. On the positive side, white-tailed sea eagle and other species are benefitting from reintroduction programmes, which in combination with eco-tourism initiatives benefit the local economy.

Back in the Cairngorms, ospreys are fed fish from a local fish farm near a hide in one eco-tourist location. Chris showed photos of a range of birds encountered in the pine forests, including the large capercaillie which feeds on pine needles. The pine forests are also a stronghold for the red squirrel, one of Chris’ favourite animals to photograph.

Chris took many of his bird of prey shots in the Cairngorms using a make-shift hide and bait taken from a friend’s roadkill-stocked freezer. This is also how he eventually managed to get his shots of the elusive Scottish wildcat, which is seldom photographed in the wild. The wildcat is a powerful animal, about half-the-size-again of the largest domestic cat. Its main distinguishing feature is its blunt rounded tail with dark bands around it. The Scottish wildcat is a sub-species of the European wildcat and its population is down to around 400 individuals in total; with the main threat being inter-breeding with female domestic cats. A charity “Highland Tiger” is helping to save the Scottish wildcat, with one of its main aims being to get people to neuter their domestic cats.

Find out more about the Wild Media Foundation here:
http://www.wildmedia.org/about_us_team.asp

Highland Tiger – saving the Scottish wildcat:
http://highlandtiger.com/
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