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Warwickshire Dragonfly Group - News pageJanuary 1st 2013 An interesting observation by Jon Bowley and Summaries of the records for 2012 and the New BDS Dragonfly Atlas Table of Latest Dates
for 2012 Table of Earliest Dates
for 2012 November 4th 2012
Autumn records & Black Darter August 29th 2012 Small Red-eyed Damselflies and Migrant Hawkers August 12th 2012
Ryton Pools Country Park, Warckickshire - field meeting
report August 7th
2012 Red-veined
Darter
(again!) and latest sightings July 28th
2012
Defence
Munitions,
Kineton,
Warwickshire
-
field
meeting
report July 1st 2012 Parsonage Moor & Dry Sandford Pit, Oxfordshire - field meeting report June 26th
2012
Warwickshire Scarce Chasers
and latest sightings June 12th
2012
Red-veined Darter and latest sightings May 13th 2012 Update of adult sightings April 23th 2012
First Adults of 2012 out & Larvae Workshop report. February 8th
2012 The "Final" tally of 2011
records
The cold finished adult dragonfly recording for
2012 fairly early as the late flights table
shows. It is time to review how the county recorders have done in
2012 and in the 2001 to 2012 recording period for the New BDS Dragonfly
Atlas. Before presenting
the review there is a very interesting observation to share. Jon Bowley's last tranche of 2012 records have a remarkable
observation for 7th September. On his record sheet he baldly
stated:
"September 8th – Lighthorne Quarry – 250 Common Darters, 50 Common Blue Damsels, 40 Migrant Hawkers, 10 Southern Hawkers, 3 Brown Hawkers, 30 Emerald Damselflies, 30 Ruddy Darters. Lighthorne Pools (Fish Farm) – thousands of dragonflies out of all the above spp including Emerald Damsels and Ruddy Darters. Also single late Blue-tailed Damselfly and Banded Demoiselle (male)." Taken aback by the by the sheer numbers of individuals for so many
species reported at one site, Ligthorne Pools, a request for further
information from Jon elicited the
following: "The records
for Lighthorne
Pools refer to huge numbers – definitely several thousand but possibly
a lot more. The Hobbies certainly enjoyed them! There was no way of
estimating individual totals but all those ... mention[ed] were
involved.
This seems to be a major centre for dragonfly breeding with a range of
pools present in different stages of flooding, and only a few at any
one time containing fish (mainly golden orfe and the like). A public
footpath follows the chain of ponds if you ever want to visit." What a wonderful experience it must have been and it shows
that even in a year with poor weather remarkable sights are still to be
seen. The tally of records
for Vice County 38 2012 is of 1321 is the
maximum ever in one year for Vice county 38. The histogram shows the
number of records per year for the period 2001 to 2012 - the recording
period
for the New BDS Dragonfly Atlas. Over a thousand have been received for
each of the last four years and for the whole period the total is 9547.
The
effort by VC38 recorders to contribute to the BDS Atlas is impressive,
particularly so in the last four years. Further analysis of our contributions to the new national atlas
can be found on the BDS National Dragonfly
Atlas page. In particular, the maps for individual species shows every
10km. square for the period 2001 to 2012 (the BDS Atlas recording
period) and highlights those squares where a species was recorded from
1961
to 2000 but not in the BDS Atlas period. All the records sent in during 2012 have now been forwarded
to
Steve Prentice at the BDS for incorporation into the national dragonfly
recording database. There is still (a very limited) time left for any
additional sighting of dragonflies you have for the period 2001 to 2012
but it will soon be too late to have them form part of the data for the
New BDS Dragonfly Atlas. Hopefully, the 2013 summer will be better for dragonflies and dragonfly watchers than 2012. Will the the poor weather of 2012 impact on dragonfly populations? Perhaps not as much as we might fear. Table of Late
Flying Dragonflies
If you have any later dates for 2012 or later times for previous years please let me have them. Back to page top. Table of
Earliest
Dates Recorded
If you have any earlier dates for 2012 or earlier times for previous years please let me have them. Back to page top. November 4th 2012 - Autumn records & Black Darter A Black Darter was recorded at the RSPB Reserve, Middelton Lakes by Maggie Perris on 11th September. This species appears in the county from time-to-time - the immediate previous sighting was in 2009. It is a heathland specialist, a very scarce habitat in V.C. 38, and the nearest known breeding population is at Cannock Chase. Three species that have been flying in considerable numbers in August and September are Common Darter, Migrant Hawker and Brown Hawker. The top count is 58 Common Darter by Jim Timms at Bubbenhall on 6th September and a further 18 counts by him and others in the tens. Kay & Peter Reeve counted 48 Migrant Hawkers on a 500 metre length of the bank of Coombe Country Park Pool on 9th September with about another half-a-dozen counts in the tens. For Brown Hawker there were four counts in the teens with the maximum of 15 by Jon Bowley at Wormleighton Reservoir on 14th August. We are now almost at the end of the of the season for recording flying dragonflies and most of the county records for the year are in and processed. If you still hold any records for this or previous years that you have not sent Peter Reeve please do so by, at latest, 30th November. This is the last date for contributions to the new National Atlas of Dragonflies and Damselflies that is to be published in the autumn of 2013. Among much else, the atlas will contain species distribution maps showing their presence/absence in every OS grid 10km square of the British Isles. The key recording period is the post 2000. Any Warwickshire (Vice County 38) records in this period are particularly welcome - the more so if they fill a square for a species. The Species Maps the National Atlas information page show the status of all species recorded in the county. A red square indicates a species has been recorded in the in the key post 2000 period, a yellow that it has been recorded at some time prior to then and a blank square that it has never been recorded. Any record, adult, larval or exuvia, that changes a blank/yellow square to red is most valuable. Please send it/them to Peter Reeve. The recording effort this year, particularly considering the poor weather, has been very good - comparing very well with the last few years: 2012 - 1273 records, 2011 - 1271, 2010 - 1287 & 2009 1132. Back to page top. August 29th 2012 - Small Red-eyed Damselflies and Migrant Hawkers Small Red-eyed Damselflies are now about in good numbers. This is in contrast to the report made on August 7th when the late start for them was noted. With the exception of Jon Bowley's Wormleighton Reservoir record on July 27th all sighting, so far, have been made in August. It has been recorded at nine sites - two of which are new for the species. These are Spernall Park, Morton Bagot where 5 individuals were seen by Mike Inskip on August 23rd and, again, on 26th Mike and Richard Harbird saw more than 20 individuals. This is now the county's most westerly site for the species. The second new site is at Bubbenhall where Jim Timms does regular monitoring transects for butterflies and dragonflies. On August 28th he counted 14 and there were two ovipositing pairs. Kay and Peter Reeve have visited, among others, eight sites Small Red-eyes have been seen in previous years and found them again at all but two. It is certainly worth looking for them in pools you know with floating and semi-submerged vegetation. As the Small Red-eyed Damselfly map shows, they are well distributed in the county and there is room to fill in and extend their range. The other species of the season is the Migrant Hawker which was also late in making its appearance. They are now about in reasonable numbers. John Harris notes: "Had 3 Migrant Hawker clashing and flying around me today" on August 28th. Peter Reeve watched half-a-dozen hawking in the lee of a hedge at Draycote Water, August 25th. As we approach autumn the number of species and individuals are dropping. Time to contribute records to the new Dragonfly National Atlas is running out together with your opportunity to be named as a contributor. Get out and record and send the records in. There is scope to fill in some county 10km. squares for the Small Red-eyed Damselfly. Back to page top. August 11th 2012 - Ryton Pools Country Park, Warwickshire - field meeting report Our party of nine was joined by park ranger Ben Coleman and we set out to explore the pools in the Country Park. We were hoping to see the target species for the day, Small Red-eyed Damselfly. The weather was reasonable for this summer, warm and cloudy with sunny periods. We found eleven species but, unfortunately, the target species did not show. The dragonflies present were: Southern, Brown, and Migrant Hawkers and an Emperor Dragonfly - six Brown Hawkers were recorded; a few Ruddy Darters; twenty, or more, Common Darters, some egg laying. Damselflies: twenty or more Emerald Damselflies, two mating pairs; two-hundred plus Common Blue Damselflies some mating and some egg-laying. The species count was rounded off by one each Azure Damselfly and Banded Demoiselle and four Blue-tailed Damselflies. There were good numbers of other insects about in the Park, notably: Silver Washed Fritillery and Mottled Grasshopper. Both rarer species for Warwickshire. Back to page top. August 7th 2012 - Red-veined Darter (again!) and latest sightings A sighting of Red-veined Darter was made by Jon Bowley. To quote his mail: This
morning (August 4th) I visited Lighthorne Quarry in good
sunshine, before the rain came down heavily. I had great views at close
quarters through 10 X 40 binoculars of a male Red-veined Darter settled
on rushes in a small marsh. I could see the red veins in the wings
quite clearly.
This is the second immigrant event in the county for the species this year - sightings were also made by John Oates in June. All our normal county breeding species have now been recorded, see the first flights table. The last entry is Small Red-eyed Damselfly, seen by Jon Bowley at Wormleighton Reservoir, 27th July. This is a late start for the species which should now be at its peak in numbers. Considerable search effort in the last three weeks by Kay & Peter Reeve at known breeding sites has been unsuccessful. The other two species that complete the list, Migrant Hawker and Ruddy Darter, also made very late appearances. This year nearly all species have made late appearances, a remarkable contrast to last year when most were so early. Numbers of individuals for some species seem low too - for example Red-eyed Damselfly. Our pond continued to produce Southern Hawkers through most of July. The final total of exuvia collected was forty-two! Our pond is not large, the surface area of the water is about 8.5 sq.m. and the maximun depth 40cm. The number of records received so far this year is well down on numbers for the same period in the previous three years. The counts are: 2009 - 817; 2010 - 909; 2011 -894; 2012 - 623. The drop is probably a result of the poor weather deterring dragonflies - and dragonfly recorders. Our dragonflies are quite resilient and on warm days with heavy showers and sunny intervals they will usually respond quickly to exploit the sunny periods. It is worth getting into the field on such days - you may be lucky and spot something like Jon Bowley's Red-veined Darter! There are just over two months of flight season left in this last year of recording for the new BDS National Dragonfly Atlas so get out and record if possible. Back to page top. July 28th 2012 - Defence Munitions, Kineton, Warwickshire - field meeting report Access to this MOD estate was very ably arranged by Bill Pearson for the party of eighteen. The site is large, 2500 acres, and there are a number of water bodies of different size and character - more than it is possible to visit in one day. The hope was that with so many eyes we would extend the species list for the estate. A particular target was Small Red-eyed Damselfly. We were hopeful as the weather was warm and sunny though fairly breezy. We started with the two Marshalling Yard ponds. The east pool, approximately 30x10 metres, is well vegetated with submerged, floating and emergent plants, quickly produced Brown Hawker, Emperor Dragonfly and Ruddy Darter. The damselflies present in varying though small numbers were: Emerald Damselfly, Azure Damselfly, Common Blue Damselfly and Blue-tailed Damselfly. The much smaller west pool was less productive with very few or single individuals of the same species except for the Emperor Dragonfly. We moved to the larger Lake, approximately 150x30 metres, which is exposed but with reasonable vegetation around the edges. It was by far the most productive water body visited on the day producing thirteen of the fifteen species recorded. At the Lake we added: Banded Demoiselle, White-legged Damselfly, Red-eyed Damselfly, Migrant Hawker, Four-spotted Chaser, Black-tailed Skimmer and Common Darter. After lunch Bill left us in the charge of serviceman, Connor. He was most helpful and in the event proved good at spotting dragonflies. Two more pools were visited, both smaller and sheltered. The first, Falcon Firs, is in a small copse and the second, the VCP Pond, in a more open area. Both were both very well stocked with Typha spp. and, not surprisingly, supported good numbers of Emerald Damselfly and Ruddy Darter, They held a total of eight species between them. The fifteenth species of the day was a Southern Hawker seen hawking. Not a bad total for the day but, unfortunately, we did not find the Small Red-eyed Damselfly or add to the species list of the estate. Very many thanks to Bill Pearson and Connor for facilitating the visit. Back to page top. July 1st 2012 - Parsonage Moor & Dry Sandford Pit, Oxfordshire - field meeting report A full complement of ten gathered in the car park and were met by Debbie Lewis of the Bedfordshire, Buckinghamshire and Oxfordshire Wildlife Trust. In her introduction to Parsonage Moor, she explained it is a limestone spring fed fen - a unique habitat in the area - that holds a rich assemblage of rare and unusual fen plants and dragonflies. As part of the management practice it is grazed by horses and Debbie warned us we could expect some interest from them! In weather that was typical of 2012, cool and cloudy, we set off for the fen - not discouraged by Debbie saying that dragonfly numbers were low this year. We soon found our first dragonfly, a newly emerged Keeled Skimmer. As the morning progressed we found two of the other three site rarities, Southern Damselfly and Small Red Damselfly. The complete list of damselflies for the fen was: Small Red Damselfly, a male and a female; Southern Damselfly, 10 males and a female; one or two of Common Blue and Blue-tailed Damselflies. And for dragonflies: one male Four-spotted Chaser; Keeled Skimmer, 3 males holding territory in a brief sunny period, one newly emerged and a larva; Common Darter, 3 newly emerged individuals , 2 larvae and one exuvia. After lunch Debbie left us and we moved on to Dry Sandford Pit, a very different habitat being an old sand extraction site. The immediate impact of the site was made by the vast numbers of Marsh Helleborines there. We had thought Debbie guilty of hyperbole when she said: "You wont avoid treading on some they are so thick on the ground." We apologise for doubting you Debbie! The site is a mosaic of habitats and includes pools and marshy areas. In the few bright intervals two more species, an Azure Damselfly and a hawking female Emperor Dragonfly, were seen together with a further 10 Southern Damselflies (both males and females), a few more Common Blue and Blue-tailed Damselflies and at least 4 newly emerged Keeled Skimmers. This completed our list for the day. Though numbers of individuals seen was low, nine species for the day was a respectable total in the weather conditions. Of the four rare species on the site we were fortunate to find three of them and only missed seeing the Variable Damselfly. Thank you Debbie and BBOWT for hosting an excellent meeting. Back to page top. June 26th 2012 - Warwickshire Scarce Chasers and latest sightings Scarce Chaser was first seen in Warwickshire in 2010 on the Avon at Marlcliff, see the 2010 news page. The species was not seen last year in spite of a number of recorders looking for it. Larvae take two years from egg to emergence and so, if the 2010 visitation included ovipositing females, their progeny should emerge this year. Kay and Peter Reeve visited Marlcliff 13th and 25th June to look for both Scarce Chaser and Club-tailed Dragonfly. A blank was drawn on 13th though there were a couple of tantalizing brief views of medium sized dragonflies which could not be identified. By contrast, on the 25th June Scarce Chaser was found in numbers. The first was a male holding territory at the river edge just through the kissing gate on the path to Bidford-on-Avon. As the searce along the river bank towards Bidford continued the count of individuals mounted. A total of fourteen males was counted, about half were holding territory the remainder were maturing and the immature colours were still showing on the abdomen through the developing pruinescence on some individuals. Several of the mature males showed signs of mating where the pruinescence had been scraped off by the female's legs. It allowed individual males to be separated. The day's was rounded off by the sight of a copulating pair that dropped into the marginal vegetation by the car park as lunch was being taken. They split and the male stopped by guarding the female while she was ovipositing. While these observation are not absolute proof of breed at the site, that requires exuvia or per-flight emergents to be seen, it is very strong evidence that Scarce Chaser is breeding in the county. No Club-tailed Dragonfly was seen on either visit. The Red-veined Darter reported below at Mash Lane Reserve stayed around for a few days. John Oates reported 3 on 13th and 5 on 18th June - all males. In spite of seaching, John found no females but as he said in his mail: There
could easily be a female lurking somewhere - it's quite boggy around
the edges and I usually watch from the firmer ground, so my searches
could easily miss a female.
One of our rarer county breeders, the Hairy Dragonfly, is still at Stockton Quarry. Kay & Peter Reeve saw two males there holding territory on 20th June. As the flight table shows, all the expected spring and early summer dragonflies are flying. The majority of species are quite late, some very late. The poor weather has inhibited both dragonflies and recorders. Much closer to home for Kay & Peter, in the last week six Southern Hawkers have emerged from our garden pond. As I write this, the one that emerged today is still perched on its exuvia by the pond. It did not get away today and will have to wait until the morning. Back to page top. June 12th 2012 - Red-veined Darter and latest sightings
Back to page top. May 13th 2012 - Update of adult sightings The number of sighting I have received so far this year is thirteen for three species. In 2011, by this date there had been 142 records for twelve species. A remarkable difference. In contrast to the very warm spring of 2011, the weather this year has been cold and wet. This must impact on the date of emergence but, even this year, the dates for Large Red Damselfly and Banded Demoiselle are typical for the species. Has the weather also had an impact on the dragonfly recorders? Perhaps some emergences have been missed because we have been sitting in the dry and warm when we should have got out there in the rain and wind. So far, there have been so few records this year we can go through each of them. The first record of the year was of Large Red Damselfly on 15th April by Jon Bowley. Kay and Peter Reeve had a single emergence from their garden 23rd April and three on 6th May. Jim Timms has three sightings, singletons at Brandon Marsh 30th April and Bubbenhall Meadow 6th May and three at Bubbenhall on 8th May. The next species to emerge was Banded Demoiselle. There are two quite early records for Middleton Lakes. Sue Walker recorded one 24th April and Max Maughan one 30th April. Steve Stroud recorded one at Hampton Wood by the river yesterday, 12th May, and Kay Reeve saw three today, 13th May, on the Avon at Marlcliff. The third species, Azure Damselfly, was spotted at Whitacre Heath yesterday, 12th May, by Kay Reeve . And that's it! We need some warmer, drier weather. Back to page top. April 23th
2012 - First Adults of 2012 out & Larvae Workshop report. The first adult Large
Red Damselfly was seen by Jon Bowley at Salford Priors on 15th
April: "a male flying weakly in the
sunshine along the sheltered edge of a plantation". Today, 23rd April, a female Large Red Damselfly was found
emerging from Kay&Peter Reeve's pond - a female. The rain came on
before it flew, lets hope it manages to make it. The Larvae Workshop at Brandon Marsh was only attended by three
people. Perhaps we need to give it a rest. However, it was enjoyed and
we found a few larvae in the pools - though not many. The larvae found
were Azure Damselfly, Common Blue-tailed Damselfly and a couple of
Southern Hawkers, the latter in the same small dipping pond. There was
a striking colour difference between Southern Hawker larvae, one dark,
almost black and the other a beautiful green with very dark eyes.
Neither were final instars. The reason for the colour difference became
clear later in the afternoon. Peter Reeve brought along a Southern
Hawker larva in an aquarium taken from his pond in the morning. It was
not a final instar and it was dark in colour. When we returned to the
meeting room we were surprised to see not one but two larvae in the
aquarium! The larva had cast its skin and moved on one instar. It was
now a beautiful green with dark eyes like the second specimen caught in
the field. This must be why the two in the pond were differently
coloured. We hypothesized that the green colour may be to help
camouflage the larva in vegetation when soft and vulnerable and it will
regain its normal brown colouration as it hardens off. Colour change at
ecdysis is briefly mentioned in "Dragonflies - Behavior and Ecology of
Odanata" by Philip Corbet. February 8th
2012 - the "Final" tally of 2011 records Quite a number of additional
records for 2011 have been received since the tally was last reported
on 23rd December 2011. The total is now 1269 which compares
very well with 1287 total for 2010. It is particularly good given the
relatively poor showing of many species in 2011. The 2011 data has now
been sent to the BDS Dragonfly Recording Network for incorporation into
the national database. Very many thanks to all who have sent in records 2011 and in
previous years. Some interesting records for earlier years were
received last year (not included in the 2011 tally above). Historical
records are always welcome. If you have any, do send them in. Please send any item for inclusion on the news page to: Peter Reeve, Co-ordinator WDG
Banner artwork by Joan Sharrett
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