Saturday, 6 September 2014

A still morning at high tide, Cliffe Pools


In the middle of the banks of yellow crucifer along the track back from Flamingo Pool, I suddenly spotted an Asteraceae with sagitate lobes surrounding the stem. It immediately shouted the sowthistle picture I'd been struggling with in County Down, and when I got it back home it looked very like one, with one of the leaves half way up the stem being superficially exactly like the picture in Francis Rose of the lower leaf of the Marsh Sowthistle.

However you cannot do Asteraceae like this, and the involucre should have been covered with blackish sticky hairs, which they were not. Saved by the hand-lens from making a horrible mistake! So starting again I looked at the other possibilities, and by elimination it started to look like a Hawksbeard, and a Smooth Hawksbeard, Crepis capillaris, at that. And that is was it turned out to be: The leaf I was looking at must have been an intermediate form as it was half way up the stem, and I should have been looking for the basal rosette leaves. As I wasn't, the pictures in Rose are almost entirely misleading, and I need to learn that lesson very carefully.  


Here you can see the whitish outer surfaces on the outer ring of ray florets, which I cannot find mention of in the floras, but is in many of the images on the web. In this plant there is also a distinct and clear tiny orange tip to some of these florets. At the bottom of the picture above you can also see the developing inflorescences, which are held vertically in life (thank goodness for turgor pressure I say!) and also shows the adpressed lower ring of phyllaries. I would have said the stems were ridged and hollow (one of the characteristics that helped me towards my initial and misleading id of Marsh Sowthistle!).

You start off by identifying that all the florets are ray-florets, with no disc florets to be seen. This takes you into Group A, the quite large and diverse group of Dandelion-like Asteraceae. Then you look at them as yellow florets, with at least some stem leaves, so eliminating Dandelion itself, but then you can't get much further if it is without fruit (achenes), so it's back to eliminating the unlikely and impossible, such as the Lettuces (characteristic branching or spike like inflorescense with smaller narrow involucres), Cats-Ear and the other hawkbits (upper stem not leafy), Mouse Ear Hawkweeds (furry leaves) and Nipplewort . Then Crepis, the Hawksbeards starts to be a possibility in amongst all these others. I didn't think it was a Hawkweed as I don't know any Hawkweeds with these backward lobes, all the leaves seem to be fairly simple entire ovate shapes.

Friday, 5 September 2014

A still afternoon at low tide, Cliffe Pools.

A fantastic view of a Common Sandpiper today, best ever!

On Radar pool I saw about 3+ Greenshank, Tringa nebularia, and 2 more on Flamingo. 2 of the 3+ on Radar were moving about eagerly in an almost robotic manner - difficult to describe but very pleasing to watch. Their heads always look particularly pale and round to me. There were also 60+ Coot, c25 Mallard, 10+ Teal, at least 4 Tufted Duck apparently in moult, 30+ Lapwing, 10+ Redshank, 30+ Dunlin (I didn't notice any Little Stints, but...), 2 Black-headed Gulls and 1 Common Sandpiper - perhaps the one I got really good close views of later?

With the Lapwings on the Flamingo beach there were 2 Ruff, Philomachus pugnax, recognizable by their "long-necked but pot-bellied" appearance, and great for me to see and identify - I am hoping to become slightly more confident on waders! These birds were quite pale, with pale faces and shorter beaks than the Greenshank, and I was semi-convinced that I could see their "scaly" backs. Their legs were quite dark, which might perhaps indicate first winter birds, although I couldn't be sure by any means. 

Wednesday, 3 September 2014

Tawny Owl calling in Dene Park!

While doing the hard-breathing 4 mile walk at Dene Park this evening there were very few insects around but I did hear a Tawny Owl calling at about 6:50. My first this autumn which says more about me than the owls! 

Thursday, 28 August 2014

Darland Banks East

It is many years since I've been onto the Eastern half of Darland Banks, so I made the effort to stop at Hoath Close today, and approach the steep downland slope from the East side, and this side does seem to have some different plants in it. You get equally good views across the green gap towards Capstone - its such a valuable lung for Gillingham.

A very nice plant to see a little way along the downland was the Blue Fleabane, Erigeron acer (L.), with its greatly reduced ray florets - remarkably pretty! It is also known as the Bitter Fleabane, and has the Latin synonym Erigeron acris, also from Linneaus.

It is an erect hairy annual or biennial about 3 to 15 inches tall with many linear-lanceolate unstalked leaves running up the upright reddish stem, unbranched until the panicle of inflorescences is reached. I didn't see the described basal rosette of stalked leaves.




The ray florets are only just longer than the yellow disc florets, pink-purple, narrow, erect. The bracts appear to me to be similar in shape, neatly pointed, but in rows of differing lengths, each row clearly overlapping the one above. Within a row they do NOT overlap. Each flower head could only just have been the described diameter of 12 - 18 mm as described in Rose, who may have got it from CTW - I would have said nearer 8 mm, and therefore as said to be less than 10mm in Luontoporti, the Finnish website! I need to go back with a ruler. The ring of white might perhaps be styles, but they could be "intermediate" florets, it is rather unclear. The flower heads themselves are held in a loose panicle of about three to half a dozen heads.


It is typically found on calcareous grassland in the UK and flowers from July to August, but is more broadly regarded as growing in rocky places and dry meadows in countries like Finland, where there are several subspecies known varying in factors such as hairiness, colour and number of inflorescences. It has a distribution that extends across to North America. In Kent it is well-known as a regular on this particular site, and I think found quite generally across the county.

Here is another head, this time just coming into fruit with each pappus joining together to appear as a strawy fuzz above the old disc florets. Stunning colour combination to our eyes!


The Yarrow was also looking good!




A very common plant at the top of the slopes was the Sainfoin, Onobrychis viciifolia, with its salmon pink flowers streaked with darker red.


Saturday, 23 August 2014

White Hill Reserve


Trying out the camera settings when I climbed the hill to the reserve, I caught this honey bee on a Devil's Bit Scabious, Succisa pratensis.


I think this might be Common Rock-rose, Helianthemum nummularium, and something has been nibbling the edges of some of the leaves. There is a Brown Argus adult to the bottom right, but i don't think the damage is entirely typical of the Brown Argus caterpillar - but maybe its not too far off.


The Dogwood, Cornus sanguinea, was in full berry.


And the yew arils are coloured up as well:




There were a fair number of Carline Thistle, Carlina vulgaris, on the shallower soils at the top of the slope.


and I think this a Dwarf Thistle, Cirsium acaule - amazing tubular structure of the individual florets.


and quite a few possibly different "hawks" in flower, possibly different members of the Asteraceae.


One of the Guelder Rose plants was colouring up very well indeed!


There were fair numbers of Chalkhill Blues, Polyommatus coridon, on the reserve today, perhaps more up the hill than at the bottom. Here was a female that looked as though it was exploring laying an egg.




This is another female, settled on a fairly bare patch of chalk at the top of the hill, and in slightly better condition:




These quite bare patches are really interesting. If you look at the top photo above, you can seen a grey thallose lichen below the butterfly.


And here is a tough moss, partly dessicated, in the section below the nibbled plant.


This is another female with the fringes very much worn away, but otherwise I think recognizeable. The only really worrying thing is that I cannot see a white streak on the v4 of the rear underwing, so I cannot be sure that it is not a Common Blue:






This is a male Chalkhill Blue,


This is another male Chalkhill Blue:


and another:


and a close-up of another head:


Here on the other hand is apparently a worn but originally very blue form of the female Common Blue, Polyommatus icarus.


This is a suspected female, but definitely a Brown Argus from the rear underwing pattern of spots.


This is another Brown Argus, this time possibly a male:


I also came across this vicious looking Robber Fly:


Wednesday, 20 August 2014

Below Brenchley

I got to the viewpoint to the north of Brenchley and was very impressed. The whole of the Low Weald is spread out before you. Beyond it the Lower Greensand Ridge rises up in the far distance apparently along the whole length of the horizon. I drove about for a bit trying to find the footpaths until I found a pull-in on the side of Knowle Road below Knole Cottages, more or less in sight of the viewpoint. 

The land on the slope just here is arable and the footpath has not been fully maintained. The crop is almost weedless except in the grassed tramline tracks, there is no grassed headland here and virtually the only non-crop vegetation is in the actual ditches themselves. This is mainly Nettle, Willowherb, Hedge Bindweed, with a bit of Purple Loosestrife. 

The wood just uphill of the path had a buzzard circling low close by, calling regularly, and possibly roosting there, perhaps having had a nest this year. Marked on the map as Winsborough Wood, it looks as though it might have some useful habitat, a mix of woodland with a bit of rough grass, worth investigating at some stage. 



I passed the wood by for the moment.  The area is very quiet and peaceful, with some-one setting a bonfire in the garden of the White Cottage. I followed the ditches and then the marked footpath towards the White Cottage. There were a couple of walkers travelling in the other direction consulting the map to see where the footpath had gone. 

The path eventually finds its way through the garden of the White Cottage to Mile Oak Road. Mile End is a really nice tiny little hamlet with a super wooden sign. 

I walked along the quiet Knole Lane until I reached the footpath by Orchard Place Farm Fishing Ponds that leads north to Pearsons Green Road. This is a long well treed path passing between the ponds, even if the oaks are a bit scraggy. There in a junction I found what looked large enough to be an Emperor Dragonfly - it looked quite dark along the abdomen but I just saw a greenish hint to the side of the thorax - a female possibly. The path has been churned up by at least one horse - there is one in the paddock of Orchard Place Farm.

Pearsons Green Road leads to the East quickly back into Knole Road which turns back South through some fields of longer grass to either side. Oddly enough there was a CCTV warning sign. As I walked up the road I thought I heard a young woodpecker yakking in a dead tree along a fisheries track, and then I heard a young robin hungrily chitting for food to its parents in the excellent mixed hedgerows. I then walked past the Longbrooks development and then the junction with Knole Lane, to where the car is parked.

As I passed the junction opposite the very attractive gates of Trenches Farm, I was suddenly enveloped by a large group of long-tailed Tits and some Warblers (Chiffchaffs?) Calling gently to themselves, this was a magical moment as I stood still enough not to alarm the birds and I got great views as well as listening, for what seemed to be about two minutes. 



Overall I had walked about two and a half kilometres, see maps below.





Back at the car I greeted another dogwalker before heading off to Dene Park to complete my target with two quick circuits. No sign of Purple Hairstreaks in the cool of the evening today, despite some sunshine. 



Adonis Blue at Queendown

This afternoon was rather overcast and cool, and I arrived at Queendown Warren at about half past two, stating until just gone five. As I parked up at the island the prospects didn't look particularly promising but the first wildflower patch did have over a dozen Meadow Browns, so there was limited encouragement there. Then I came across three Brown Argus there, and so I thought things were looking up a little. The next flower patch had both Brown Argus and Common Blues in reasonable numbers, and so I moved down to the bottom of the slope and picked up more of the same.

Through the fence and along to the next flower patch closer to the far corner and I was coming across Chalkhill Blues as well, and then finally the Adonis Blue, concentrated in the far corner. Good numbers of Lycaenids by now, all tending to sun, nectar and roost. I was using ISO 200 and I was quite happy with the picture quality, particularly when I switched to AV mode to ensure a slightly better depth of field. However I always have to watch our for motion blurring, either camera or subject so I need to keep an eye on the exposure speed when in AV.

This was a photo of a Brown Argus, Aricia agestis, possibly a female, partly shielded by foliage.


I got some nice photos of the male Adonis Blues. I don't think I noticed any females - they are more difficult to spot!


This is an Adonis Blue head close-up showing something of the eye colouration, antennal insertion above the ye, forehead tuft and maxillary palps.


The Adonis Blue has undergone great population changes over the last few decades, as befits a butterfly with a single food plant with highly exacting environmental requirements at the northern extremity of its range! Populations crashed very badly in the 70s in the UK, said to be due to the terrific drought of '76 affecting its foodplant the Horseshoe Vetch - God bless Dennis Howell who finally ended it by getting appointed as Minister for Drought, at which point the heavens immediately opened, creating floods!

Perhaps we should be seeing butterflies as extremely flaky organisms, subject to regular extinction and recolonisation in a very highly dynamic system. If this is so, then we would probably have very few species in Great Britain compared to Europe.....well, do the maths as the Americans seem to almost continually say! And populations should have remarkable powers of recuperation - the Adonis Blue is not a great spreader, in fact one of the worst, but it is rather good at recuperation - one colony increased from less than 50 to 60,000 in five years! There is also a theory with some considerable degree of backup from DNA evidence, that the current British population only arrived from Europe in the 18th Century. Perhaps then butterflies are not really the organisms best suited to act as the environmental canaries in the mine, being rather over-responsive!

Future conservation measures might be more solidly focussed if we knew more of the ecology of the Horseshoe Vetch. I wonder if we could now encourage it to grow in more diverse parts of Queendown, where it was introduced by KWT in 2002, with a greater variety of soil depth. That might give more resilience to the Adonis Blue in different summers and with different grazing intensities. Then we may need to do something about its lack of mobility - carefully! It seems to be doing OK in Kent, partly because of the reintroductions at Queendown and Darland Banks.

There are some excellent websites including this one "Learn about Butterflies".