Interesting observations at Coombe Hill, even in dry conditions

Recent rain in Gloucester hasn’t raised water levels at the GWT reserve at Coombe Hill; the north scrape is completely dry, and the south scrape is almost dry – just a dribble of water left yesterday 29 July.  There is still water on the Long Pool however, though the Long Pool hide is closed (as in previous years at this time), because of a hornet’s nest.

Interesting stuff however: at first sight, there were no birds on the north or south scrapes.  But occasional Little Ringed Plover calls could be heard from the Grundon Hide; after a while these became ever more anxious, as two Kestrels landed in the short aquatic vegetation in the north scrape; the Kestrels appeared to be an adult female accompanied by a juvenile, probably recently out of the nest, and were clearly hunting on the ground.  The adult LRP kept running around on the floor of the scrape, then undertaking nervous circular flights round  and round; the chicks (which ought to be fledged by now, as they were first seen on 3 July and someone recorded them during the week as fledged) never showed any sign of flying and stayed round the scrape – there was no sign of LRPs on the Long Pool.  Not sure what the outcome was: the Kestrels were never seen actually to catch any prey, while the chicks were never seen to emerge from the vegetation unscathed.

Surprising, on one hand that the chicks didn’t try to fly, but just lay doggo, on the ground; they can’t yet be confident of flying away; and on the other that Kestrels were trying to catch them on the ground: any other raptor, you might have thought, but surely the windhover is an aerial predator.

Otherwise, mostly on the Long Pool, which still attracts passing waterbirds:  eight unringed Canada Geese, 100 Mallard, 180 Lapwings, five Green Sandpipers, and two Snipe; still at least eight Sedge Warblers (generally churring rather than singing) in the thick ditch side vegetation through the reserve.

And lots of wild flowers now; Corky-fruited Water Dropwort and Flowering Rush among others

Ringing at Ashleworth

Yesterday 22 July we carried out another of the regular Constant Effort Site ringing sessions at Ashleworth, where no hay has as yet been cut on the GWT reserve.

Outwardly, it appeared that there were few birds about: scrapes almost dry, little or no birdsong, not much activity.  But the ringing showed that in fact there were large numbers of recently fledged young birds present, recently emerged from the nest, often just completing their post juvenile moult, before setting off on their long migration journeys to the Mediterranean and sub-Saharan Africa.  It is very likely that all these juveniles were locally bred, as they would hardly move off before completing this moult, and almost none of them showed any additional fat (which migrants arriving from outside the reserve would be likely to do).  So, this represents a snapshot of breeding attempts and successes.  After Friday’s fairly heavy rain, conditions were surprisingly favourable: windless in the early morning, with a light cloud covering which made the nets more difficult for the birds to see.  We had a catch of 93 birds, slightly above the average for the mid July visit, and made up as follows:

  • One juvenile Kingfisher; unusually, no Redstarts caught, though there had been several adults earlier in the season; one juvenile Grasshopper Warbler (particularly interesting, as on earlier visits we had caught an adult male and female in breeding condition: this is a very strong indication of local breeding); no Reed Warblers caught or heard, which suggests that they did not attempt to nest this year; nine Sedge Warblers (mainly juveniles, but a couple of ringed adults, caught earlier in the season; so they haven’t left yet, but will be going soon); as many as 32 Whitethroats (all but one were juveniles, showing that this species has increased greatly in the hay meadow hedges in recent years); seven Blackcaps (two adults and five juveniles, probably birds that had nested in slightly higher ground round the edges of the reserve, and were now moving into lower areas; like Whitethroat, more than usual); no Lesser Whitethroats this time, though we have caught juveniles on previous visits; eleven Chiffchaffs (every man jack of them a juvenile); two Willow Warblers (one adult and one juvenile); nine Reed Buntings (again, all juveniles; late hay cutting may have helped this species which nests in long vegetation in hayfields).  Also, as usual, a variety of resident breeders: one juvenile Dunnock; seven Wrens (nearly all juveniles); three juvenile Robins; one juvenile Great Tit; one juvenile Blue Tit; five Long-tailed Tits, mainly juveniles; one adult Linnet; one juvenile Goldfinch.

Few other birds of note around the reserve: one adult male Peregrine perched on a dead willow; about 20 House Martins and 20 Swallows hawking insects (probably locally bred juveniles as well).Mervyn Greening, Mike Smart

Mervyn Greening, Mike Smart

Strawberry theft by small animal

We have several raised beds with strawberry plants, and nearby another bed with courgette plants. They are all contained in a cage covered in chicken wire, to keep out the deer and pheasants, among other animals that would eat our vegetables. This is out in the country, near Caudle Green.

We noticed that we were not getting many strawberries and sometimes we found unripe ones cut off from their stems and lying on the ground under the plants. Today we found part of the answer. On going to pick some courgettes we found this huge stash of rotting strawberries. A creature has been picking the strawberries and carrying them to the courgette bed.

We have a huge population of voles in the garden, so perhaps it is them, or perhaps a mouse?

Richard and Jenny Beal

Curlews along the Avon

Baby Curlew 1 July 2017

I had a very interesting day looking at Curlews along the River Avon, both the Worcestershire  and Gloucestershire banks, on 1 July.  One site on the Gloucestershire bank is a Lammas meadow, cut late for hay (not silage) and above all, cut gradually, strip by strip; access by the public is not allowed in the breeding season from 1 March to 31 July, to avoid disturbance of ground-nesting birds.  Rather little of the hay had been cut (less than 10%), but the Curlews, both young and old, seemed happy feeding on the cut strips.  Looking along the cut strips from a distance with a telescope, I could see two young birds of the year: one was already able to fly (which is a very early date, last year I saw fledged birds from 9 to 23 July); it was obviously a young bird from the short, only partly de-curved beak, and from the bright spangled plumage on the upperparts – dark centres and buff edges, recalling juvenile Ruff.  The second youngster was nearly full grown, but with no proper tail and only a fluffy ball of down at its rear end, and the wings not yet fully developed, not showing beyond the tail, so not yet flying; presumably two different broods.  When I approached, the fledged bird flew off on its own; the other one disappeared, no doubt lying doggo and burying its way into the grass; one adult (apparently a male) hung around, very anxious, repeatedly giving the two note alarm call (“cour-LEE”, accent on the second syllable, repeated rapidly), which is no doubt the signal to big chicks to lie doggo.  Another adult got up a bit further on in the long grass, doing the five note alarm: I suspect this call means that there is another brood in there, with perhaps slightly younger chicks.  At this site last year, a little group of fledged birds of the year were present for a few days, in a group together, after the last adults had left; I took them to be locally bred birds, but they might of course have been passage birds from elsewhere; I’ll be interested to see if the same happens this year.

I then moved to the east bank, in Worcestershire.  In one hay meadow there, I have seen fledged young in the last couple of years.  On previous visits this year, I have found adults present on this field, but on my last visit, there was no sign of them, though I walked right through the field.  I walked right round the field again on 1 July, and had almost completed my circuit, without seeing any Curlews.  Then, suddenly, only ten yards away, a very agitated adult rose, calling desperately, and I heard quiet calls, apparently from young birds.  When I looked closely  I found two freshly hatched young, with large remains of eggshells still in the nest, (see pictures); they were so young, they didn’t even run away or burrow;  I think they must have hatched that very day. This shows, firstly, how closely birds will sit, without rising at the approach of an observer: it’s very easy to overlook birds acting so secretively.  Secondly, this is an incredibly late date for hatching: it must be a replacement clutch.  The young won’t be flying until about 5 August, even if they manage to escape hay-cutting: I’ve spoken to the farmer, who is sympathetic, but he needs to cut his hay some time!  After this, I then visited another nearby field, where the farmer purposely leaves his fields uncut until the Curlews have fledged.  He has already seen young in this field, and on my visit there was an anxious adult doing the five note alarm: I’m sure there is at least one young bird in the long grass.  At this site, there was a flock of up to 15 adult Curlews in mid-June: I take these to have been failed breeders or non-breeders, gathering in a flock before departing to moulting and wintering sites on the estuary and coastline.  No sign of them on 1 July, just the one anxious adult.

National Meadows Day – 1st July 2017

National Meadows Day

Celebration
Saturday July 1st 2017 from 10:30
at the
Angus Buchanan Recreation Ground
Victoria Rd, Coleford, GL16 8DS

National Meadows Day celebrates the wildflowers and wildlife in traditional meadows and grassland. Open from 10:30AM to 3:30PM there will be guided walks at 11:00 and 2:00 with specialists on hand to help identify flowers and insects. From 1:00 to 2:00PM you can get expert advice on how best to photograph wildflowers.

The walks are free and all are welcome, please wear sensible shoes or trainers. There is plenty of free parking.

Dean Meadows Group
www.deanmeadows.org.uk

Holy Bee-flies!

Bombylius major (Dark-edged Bee-fly) in a Cotswold churchyard.

No, the title of this note is not an unexpectedly pious exclamation from the script of a new Batman film, but rather the consequence of an idea that has been developing in my mind as one of the county fly recorders.

Dark-edged Bee-fly feeding.

Our most common bee-fly is Bombylius major (Dark-edged Bee-fly) which appears quite early in the year (the first Gloucestershire records in 2017 are from 15 March). The species has two essential site requirements: the presence of solitary bees (because its own larvae feed on the larvae of the bees) and of the spring wild flowers which the adult flies visit for nectar. These requirements may be met in a wide range of habitats, including urban parks and gardens, but are not so easily found across intensively farmed countryside.

Dotted Bee-fly at rest.

Although it is much less common, Bombylius discolor (Dotted Bee-fly) can also be seen in Gloucestershire. The two species are difficult to distinguish unless the pattern of dark markings on their wings can be seen clearly.

Last year it occurred to me that churchyards might be good places to search for bee-flies, particularly in the Cotswolds where some village churchyards provide oases of semi-natural vegetation within many square miles of agricultural land. This year I am continuing to explore this idea during the flight season of the adult bee-flies, which are active between March and June.

A tightly mown churchyard – but bee-flies inhabit a marginal semi-natural strip.

Sadly, even some of our most picturesque rural villages have churchyards in which the only natural vegetation permitted is tightly mown grass. The solitary bees may still make use of some of these places, but they are unlikely to attract bee-flies in the absence of unmanicured corners where native flowers can grow.

A corner of the most floral semi-natural churchyard I have found.

On the other hand there are churchyards subject to less intensive management (either deliberately or thanks to benign neglect) where springtime flowers  can flourish; my experience so far suggests that, with a little patient searching, the Dark-edged Bee-fly can almost always be found in such places.

There are also, of course, intermediate situations, such as a spacious, mown grass churchyard I have visited where several trees have been removed in the recent past, but the ground flora of violets and celandine that they once sheltered is hanging on; presumably the surrounding grass will eventually overwhelm these flowers, but for the moment they are still attracting bee-flies. Unsympathetic management is an obvious threat to the flora and fauna of our churchyards; perhaps the presence or absence of bee-flies could play a part in assessing their wildlife value,  in both rural and urban parts of the county.

Heaven for bee-flies, bumblebees and other pollinating insects – another corner of that very floral churchyard.

Forthcoming Meeting Dates for your Diary

The GNS Annual General Meeting will take place on Friday 7th April at Watermoor Church Hall, Cirencester, 7.00 for 7.30pm, followed by a talk from David Simcox – the fascinating history of the Large Blue Butterfly in the Cotswolds and the story of its re-introduction.

GNS Outdoor Meeting Sunday 26th March – A visit to Coombe Hill Canal and Reserve – General Interest to be led by Andrew Bluett (01452 610085 / 07584 689090) – 10.00 am until 12.30. Meet in the reserve car park; follow the narrow lane to the left of the Swan Inn at Coombe Hill traffic lights on the A38 to the car par at the end of the canal. SO 886 272. Please dress appropriately for the weather, you may get away with good boots but wellingtons will probably be necessary.

GNS Outdoor Meeting Sunday 9th April – Darkham Wood, Redmarley – A new venue for GNS Meetings in a privately-owned wood; This is a recording meeting and a chance to find out what wildlife is present. Drive through the village of Redmarley from the A417 towards Durbridge Farm, meet at the entrance to the wood SO 740 301 and drive through to the hardstanding area. Leaders are Rick Benson-Bunch and Des Marshall – 01242 245143, 10.00am to 1.00pm. Please dress appropriately for the weather, good boots or wellingtons will be necessary.

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