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Showing posts with label Crayford Marshes. Show all posts
Showing posts with label Crayford Marshes. Show all posts

Friday, 17 December 2010

17/12/10: No pain, no gain - Bearded Tit on Crayford Marshes

I was perusing the London Bird Club (London Natural History Society, Ornithology Section) Wiki ('Latest news' page)

http://londonbirders.wikia.com/wiki/LatestNews

for the first time in a while yesterday evening, because I fancy seeing my first Waxwings. Sure enough, some had been seen in Old Bexley, also in Bromley.

But what caught my eye were reports of Bearded Tits on Crayford Marshes this week, both by Erith Yacht Club, and also along the Cray by the landfill mound - the latter location being a stone's throw (or three) from Thames Road Wetland ....

Never having seen one of those either, and since they're scarcer in this part of the world at any rate, I ignored the weather forecast and hot (later to become frozen-)footed it down there.

Setting off at 11.15, I took the Colyers Lane route towards Slade Green station. It was overcast, but seemed fairly mild. A couple of Blackbirds, some Starlings and a Collared Dove were seen en route. Another 18 Starlings were along Northend Rd, and 11 more in Barnett Close.

On the recreation ground west of the station 10 Feral Pigeons were feeding on the ground, and a couple of Carrion Crow were seen.

10 Starlings were on a TV aerial at the junction of Howbury Lane and Whitehall Lane, 26 were on aerials on the east side of Slade Green station, mainly on the former pub, about 36 more were on a tall Poplar nearby (some may have moved from one of these locations to the other by now), 38 were seen flying from Howbury Grange west towards the football pitch on the north side of Moat Lane and 24 more were at Howbury Grange itself.

At this end of the Moat Lane footpath were a Song Thrush, a fairly approachable Pied Wagtail, 3 Chaffinches, a Great Tit and a Blue Tit.

A count of Wood Pigeons sitting in the row of large Willows yielded a total of 97, with 8 in small trees further along. 3 male Blackbirds were hanging out together not far beyond.

Three Redwings, my first definite sightings of the year, were in the patch of Hawthorns where Moat Lane rises up to the flood defence embankment on the Darent.

By now it was getting rather colder and it started snowing. Lapwings, Redshank and a handful of Teal were along the river. The ducks seemed to be happy enough ducking under for a 'wash and brush up' in the cold water. 8 Mute Swans evidently saw things rather differently and had decided the best place to be was up on the grassy banks. The eerie calls of waders, piercing the increasingly gloomy conditions, were a potent reminder of just how wild this place once was.

I pressed on past the flood control gate, and the snow was being blown sideways. There was no quick way home from here anyway. The nearer I got to Essex across the big river, the less I could see of it through the streaming white stuff.

50 Lapwing populated the exposed mud where the Darent joins the Thames, along with a lot of Gulls. There were a few Dunlin here too. By now it was getting difficult to focus the bins on account of cold fingers, and problematic with gloves on.

Pressing on towards Erith Saltings, by the Yacht Club, one of the reported Bearded Tit sites, a largish flock of Chaffinches flew up from the rough. There were several Teal and some Wigeon on the water, with Gadwall and Mallard mostly on the mud. A Grey Heron stood sentry. A few Cormorants were in evidence. A single Curlew or maybe Whimbrel (my birding skills are somewhat deficient) was spotted.

Now my feet were really feeling the cold, despite three layers of socks. I set off down Ray Lamb Way, and was rewarded with half a dozen Redwing in trees on the rough verge between the road and houses. In addition, the sun came out. A three-quarter moon appeared, looking unusually large in a blue sky dotted with both grey and white clouds. A small white plane, caught in the sunlight, flew over the moon.

Heading towards Darent industrial estate, the icy conditions, lack of a footpath and heavy-ish traffic created potentially hazardous conditions and I nearly fell too far down the side of a drainage ditch. Just as I got to the first of the buildings, a Green Woodpecker flew over.

I took the footpath which comes back out onto the Darent, a way up stream of the floodgate, then turned right, heading back towards Moat Lane and on to the Cray. I surveyed the view, now lit up in quite the fantastic light of a low winter sun in a clear blue sky, and with the bonus of snow on the ground.

Then there was sun ..... The moon over the QE2 bridge, and Littlebrook power station, looking across Reed bed and the channel of the River Darent from London into Kent.

The view west down Moat Lane, the way I'd come earlier in the day. But now I was heading further south - to the Cray ......

Lapwing dotted the increasing areas of mud on the river bank, and a Fox was seen over on Dartford marsh.

Heading up the footpath flanking the Cray, a flock of around 36 Chaffinches was seen.

Something was noticed in the big embayment of Common Reed on the Dartford side, and after much fiddling about getting my frozen fingers to focus the binoculars, a sighting of one male Reed Bunting became two males and a female.

This was the other area, by the landfill mound, where Bearded Tit had been reported from earlier in the week. But they could have been seen anywhere along this lengthy stretch. For some reason I stayed put. There was a slightly different sort of call. Could that be it (ooops, I hadn't checked what Bearded Tits sound like .....). A heavy-ish movement was seen in the top of some Common Reed. Not, I sensed, the wind-generated sort. I got the bins on the right spot. Shortly, a rear view of something unfamiliar was seen. Two prominent white bands down the back. Again, I wasn't sure what they were supposed to look like from this angle. But it was different. I knew that much. I moved closer. In next to no time I was rewarded with a 3/4 front view of an obliging male Bearded Tit, oblivious to, or unfazed by my presence. And from less than 30 feet away. Fantastic. Moreover it was on the north side of the river, and therefore a legitimate London, and London Borough of Bexley 'tick'. A few yards distant on the other side of the water, and it would have been in Kent. Not to mention hard to see in the gathering gloom.

Reed bed (foreground) where my first ever Bearded Tit was seen this afternoon.

Mission accomplished, but I didn't feel as excited as I would have been if I'd seen one on Thames Road Wetland. But by now it was 15.50, and by the time I got to TRW it was too dingy to see anything much very clearly. There were some calls from the Reedmace/Reed bed, but not being a birder, I had no idea what all of them were .......

Worse than the cold was the walk home. These wellies had been OK on a shorter trek, but they must have a subtle, but untoward effect on leg movement, as the fronts of my thighs were now hurting rather a lot from the unusual strain I presume this had been putting them under. The problem might rule out traipsing around looking for Waxwings tomorrow if I can't find a quick vegan way of keeping my feet both dry and rather warmer! No pain, no gain, as they say .....

Thursday, 7 October 2010

7/10/10: Crayford Creek exotics and missing Marsh plant

The land-filled 'landward' end of Crayford Marshes, along Crayford Creek, has long been known for its 'exotics'. There are a number of such records in Rodney Burton's 'Flora of the London Area' (published by the London Natural History Society in 1983).

A few more were gleaned today. On a bund of clay-ey spoil by the 'entrance' to the marsh (TQ 53026 75581), were the following garden escapes, all in flower ........

Ice Plant (Sedum spectabile)

and a red-flowered single Dahlia (foreground) with two substantial yellow-flowered Marvel of Peru (Mirabilis jalapa) behind, left.

My actual 'mission' was to search for any remnant of the very rare Marsh Sow-thistle (Sonchus palustris), for which the bank of the Creek was a well-known site. Indeed Burton says that there used to be a 20 yard strip of it. Armed with a grid reference provided by someone who had recorded it there in the past, I checked some tens of metres along the bank either side of the stated location. As thoroughly as I thought prudent, at any rate - given that this involved 'wading' up to my thighs in flattened Phragmites, and a blanket of Cow Parsley, Nettles and decaying Hedge Bindweed, such that I could not see where my feet were going and I was concerned I might disappear down into some hidden, wet and deep ditch. But there was no sign of the Sow-thistle which, it has been alleged, was deliberately destroyed by persons with development proposals in mind.

Former Marsh Sow-thistle site, now a mat of Common Reed and coarse 'weeds'

Mayweeds and Bristly Ox-tongue brighten up landfill capping on Crayford Marshes

Looking across Dartford Creek (the River Darent) towards the flood control barrier near the Thames, showing the flat, open character of the marshes. The low rise on the horizon, in the centre of the picture, is part of Essex, on the north bank.

Further on, the was a small patch of Tansy in the footpath, and a larger one not far from the fence in a neighbouring field. A Little Egret took flight from the Dartford Creek.

Along Moat Lane several Geranium pyrenaicum, Common Toadflax, Spotted Medick and a single White Melilot were seen. There were two Mute Swans on Howbury Grange moat.

Towards dusk now, around 80 Starlings were wheeling over Slade Green station.

Friday, 2 July 2010

2/7/10: New White-letter Hairstreak colony in Bexley

The LNHS Horsenden Hill meeting, which was the first time I'd seen White-letter Hairstreaks, was a useful event for getting my 'eye in' and was absolutely instrumental in enabling me to find the species along Moat Lane on Crayford Marshes today. I was also spurred on by Tristan Bantock having said he also thought there was a good chance of it being there when we were making our way along the lane towards Slade Green aftera bug-hunt earlier in June.

Moat Lane, Crayford Marshes, on a sunny evening back on the 23rd April 2010. The substantial English Elm 'hedge' where the White-letter Hairstreaks were found is on the left (south) side, here catching the evening sun from the west.

The lane has longish stretches of English Elm 'monoculture' to about 18-20' tall along the south side, and a few rather smaller ones on the north side. Horses are pastured on the rough grazing adjacent to the hedge. I saw between 7 and 9 likely different individuals, two of which I got side-on good binocular views of and so can be absolutely certain of the ID. They appeared to only be using the (south side) Elm some way along the lane at present (around TQ 530 767), and not that near the Slade Green station end or opposite the moat of Howbury Grange.

The weather was hot and sunny, with some blustery breezes and the odd dark cloud blotting out the sun for short periods. The observations were made between 11.40 a.m. to around 13.30.

The White-letter Hairstreak is a UK and London Borough of Bexley Council BAP priority species, and the Council's website says the only place it occurs in the Borough is in a wood at Foot's Cray Meadows.

Other species seen along the lane today were:

Probable Holly Blue
Common Blue
Large Skipper
Small Skipper
Small White
Meadow Brown
Comma

and a couple of female Broad-bodied Chasers and Darter species.

There were 4 Swallows (probably fledglings) sitting on the barbed wire fence of the field around the moat, and a few Swifts overhead.

Coming hard on the heels of the W-LHS find, a little further along the lane towards the River Darent were 2 or 3 clumps of Crown Vetch, my second find of it in the Borough - the other also having been on the Marshes, in that case away to the west near Crossness.

Out by the river were a Small Heath, 2 Common Blues, a Kestrel and Tufted Vetch.

Thursday, 29 October 2009

Slender Hare's-ear find is first for more than a century

A specimen of one of the 'unusual' plants that I brought to the attention of my companions on my most recent visit to Crayford Marshes (22/9/09 - see separate posting), because I didn't recognise it, was subsequently sent by one of them, Margot Godfrey, to the chap who is writing a paper on rare plants of London. She has rung me to say that he is very excited because he has confirmed that it is Slender Hare's-ear (Bupleurum tenuissimum), a small, very slender umbellifer. Apparently this species has not been recorded this far up the Thames, nor within the London boundary, since the nineteenth century.

In the light of this development, Margot made a subsequent visit and counted over 100 individuals of this annual plant. I can also report (4/11/09 update) that the herbarium specimens collected at this site were held up as the highlight of the plant material exhibited at the London Natural History Society's AGM / Flora of London Project talk which I attended.

A photo of this species, taken in East Sussex, can be found here:

http://www.flickr.com/photos/itsaboyd/2771952492/