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Re: Padfield

Posted: Sat Aug 01, 2015 11:49 am
by Padfield
On Thursday, Minnie and I set off for an adventure in Graubünden. The hope was to find Melitaea asteria - unfortunately unrealised. I have no idea even whether the species flies where I am looking for it but I much prefer searching on my own to turning up at known sites. The problem is, Graubünden is so far away we end up with very little time for the actual searching.

As it was 100% cloud cover on Thursday, we left home rather late, arriving at our final station at about 15h30. This is at 700m. So Thursday's work was to climb up to 1900m and set up for the night. This was very pleasant in the relatively cool weather. Last year, we bivvied well off the jeep track (so we didn't get kicked off by some landowner or crofter), under some larches. When we reached this point on the road, Minnie instictively turned off and headed for our bivvy spot. She has been there just once in her short life - but dogs have near perfect scent-based GPS of everywhere they have been. We ate supper, laid out the bivvy and turned in for the night as it started raining.

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The next morning we set off early, leaving almost no trace of our passage:

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Despite a forecast of wall-to-wall sunshine, the cloud persisted as we climbed the mountain and it remained cold:

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We kept thinking we were getting above the cloud but then more cloud would suddenly roll over us:

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Here is a 'selfie with halo'! :D My shadow is cast onto a very close cloud, reflecting a rainbow centred on my head (strictly, centred on my camera):

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Eventually, we reached the highest point of the range, and almost at the same time the last clouds cleared:

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The problem was, by now it was 10h00 and still cold at that altitude. To be sure of getting home the same day we had to be back in the valley at 700m by 15h30. Almost nothing was flying yet - just a few Erebia (mostly tyndarus and pandrose there). I would have liked to spend a few hours exploring the region, when I am pretty sure I could have found our target (unless it has already stopped flying, which is a distinct possibility this year, with almost every day in July having been a flight day) but we only had time for a cursory wander before heading back down, slowly, sweeping the now sunny lower altitudes for asteria (which flies between about 2000m and 3000m).

Unfortunately, Minnie had to be attached the whole time, as there were marmots everywhere:

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There were also chamois grazing. When the wind blows in the right direction, Minnie can spot these from about a kilometre away!

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Reciprocally, these chamois caught wind of us and bounded elegantly down the rocky slope:

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Because of being attached to Minnie, and also because I had a heavy backpack on the whole time, I took rather few photos of butterflies even on the way down. In the end this was more of a Minnie adventure than a butterfly trip. But I learnt that I can't really do this site with one overnight stay. I either have to bivvy two nights in a row (and carry correspondingly more food and drink everywhere) or book one night in the valley at a hostel.

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As it turned out, I had greatly overestimated the descent time and we reached the station over an hour early. We will find asteria next year!!

Guy

Re: Padfield

Posted: Sat Aug 01, 2015 4:11 pm
by Padfield
When I took Minnie out at lunchtime the second white admiral caterpillar on the double cat leaf was just hatching. In the first picture, the caterpillar at the bottom is an impostor, having hatched on the neighbouring leaf and moved onto this one. The amorphous blob higher up, a little to the left, is the newly hatching caterpillar:

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It was cold and raining and the newbie was taking his time, so we carried on to look for purple emperor eggs - still with no success. On our return the caterpillar was eating its egg. Minnie couldn't sit around in the rain, so I took her home and came out on my own later. At half past four, nearly three hours after hatching, the caterpillar was still guzzling its egg:

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I might check again before nightfall but it is already very gloomy, just because of the cloud and rain.

Here's something you don't see every day - a white admiral caterpillar on the outside of a raindrop!

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Despite appearances, it's not actually walking on water but is on its thread-like leaf extension, which has been caught in the surface tension of the drop.

Guy

Re: Padfield

Posted: Sat Aug 01, 2015 4:40 pm
by Chris Jackson
I enjoyed your account of your hunt, Guy, for the Melitaea asteria. That is what I call dedication.
I can see in T&L that its range is very restricted to Switzerland.
You deserve your Chief Scouts Award (if you havn't got it already) for bivouacing, and generally roughing it in harsh conditions. :D
Cheers, Chris

Re: Padfield

Posted: Sat Aug 01, 2015 6:12 pm
by Cotswold Cockney
Padfield wrote:...

Here's something you don't see every day - a white admiral caterpillar on the outside of a raindrop!

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Despite appearances, it's not actually walking on water but is on its thread-like leaf extension, which has been caught in the surface tension of the drop.

Guy
Nice one Guy. Proof positive :~
Cotswold Cockney wrote:....

The leaf tip extension may also assist during periods of prolonged rain when all the leaves would be saturated and loaded with rainwater but, that extension would enable rapid draining without harm to the minute larva.

All guess work and there could be other reasons too. .

Re: Padfield

Posted: Sat Aug 01, 2015 7:18 pm
by Pauline
You've got a winning combination there Guy - an amazing little dog and wonderful scenery. I could look at those shots all day :D

Re: Padfield

Posted: Sat Aug 01, 2015 7:27 pm
by bugboy
That sounds (and looks) like my kind of excursion! :)

Re: Padfield

Posted: Sat Aug 01, 2015 7:51 pm
by Padfield
cjackson wrote:You deserve your Chief Scouts Award (if you havn't got it already) for bivouacing, and generally roughing it in harsh conditions. :D
Nothing refreshes like a night under the stars, Chris, even when the stars are hidden by cloud! :D
Cotswold Cockney wrote:Nice one Guy. Proof positive :~
Indeed. The caterpillar has total control over how wet or dry it wants to be, as this picture shows:

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Pauline wrote:You've got a winning combination there Guy - an amazing little dog and wonderful scenery. I could look at those shots all day :D
She is an amazing little thing, Pauline. It's hard to believe I've only had her a little over a year - it seems as if we've been friends forever. And yes, you don't need to go far in Switzerland to find solitude and beauty.
bugboy wrote:That sounds (and looks) like my kind of excursion! :)
Good to know there are other like-minded expeditioners around, Buggy! I didn't see anyone else up there yesterday, though ...

I did pop out to see the newborn caterpillar tonight. At ten to nine, well over seven hours after it hatched, it was still at the eggshell:

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While I was there it raised itself up, as I have seen purple emperor caterpillars do when they are finished eating the shell. But I didn't hang around because I didn't want my light (it was totally dark in that part of the woods and I couldn't even see the leaves without light) to influence its behaviour. So I left it saluting the moon (of which there was no sign, because of the rain clouds):

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Guy

Guy

Re: Padfield

Posted: Sat Aug 01, 2015 7:59 pm
by Pete Eeles
Excellent reports as ever ... love the raindrop pic! Can't wait to hear the conclusion of the camilla episode :)

Cheers,

- Pete

Re: Padfield

Posted: Sat Aug 01, 2015 8:52 pm
by David M
Truly atmospheric stuff, Guy.

No wonder you love living in your part of Europe so much!

Shame you didn't gain an audience with your target species, but the effort you put in will, I'm sure, reap dividends in future.

That's what being a true devotee is all about!!

Re: Padfield

Posted: Sun Aug 02, 2015 9:12 am
by Padfield
David M wrote:Truly atmospheric stuff, Guy.
Literally! :D
Pete Eeles wrote: Can't wait to hear the conclusion of the camilla episode :)
I hope the conclusion will be two beautiful butterflies in June next year, Pete! But I can give you the latest instalment now.

Initially, when I checked the leaves this morning, I thought both caterpillars had disappeared. But on closer inspection it turned out the first-born was still there, tucked under the terminal raindrop:

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Junior was nowhere to be seen but he had to be there somewhere. He hadn't gone to the neighbouring leaf, where the older caterpillar had originally hatched. Then I noticed the tiniest of nicks in a more distant leaf, without any egg or egg traces:

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Examining that leaf, I found junior, engaged in some kind of frass-based construction work:

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It's still cool and everything's happening very slowly, so I'll have to wait to find out what becomes of that. But the immediate answer to the question of what happens when a larva hatches onto a leaf already containing a larva is that the newbie goes off and sets up camp somewhere relatively distant.

Guy

Re: Padfield

Posted: Sun Aug 02, 2015 10:15 am
by Pete Eeles
Excellent field observation, Guy. You beat me to it, but am relieved that the mystery has been solved. I'll see if I can find more examples over the coming weeks :)

Cheers,

- Pete

Re: Padfield

Posted: Sun Aug 02, 2015 1:25 pm
by Padfield
Sorry Pete - back to square one. The water droplets all over the leaves earlier this morning concealed the fact there was, indeed, a hatched egg on the leaf where I thought junior had arrived. It is towards the bottom right of this picture, with a silk trail leading towards the tip:

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So I don't know. Clearly, the new caterpillar is exactly the right age to be the one I saw hatch last night - it began preparing the leaf tip just this morning. But the fact remains, there are two caterpillars on the spray and three hatched eggs. I haven't got any photos of that leaf indicating when that last egg hatched. All can say for certain is that there are not two caterpillars sharing the same leaf.

'Junior' is now beginning to add frass to the tip of the midrib:

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Strange - these things happen so slowly it's like watching paint dry, but if you blink you miss it! :D

Guy

Re: Padfield

Posted: Sun Aug 02, 2015 3:13 pm
by Pete Eeles
No worries Guy ...the search continues :)

Cheers,

- Pete

Re: Padfield

Posted: Tue Aug 04, 2015 11:26 am
by Padfield
Poor little Minnie visited the vet today for sterilisation. I stayed with her until she was fast asleep, under general anaesthetic, then cycled off to my nearest reliable 'tails' site, not far from the vet's. It was very overcast but I hoped to find at least short-tailed blue, if not a few long-tailed blue, roosting.

No long-tailed appeared - this is a non-resident species that just usually turns up at this site - but there were plenty of short-tailed, frequently flying despite the weather.

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(male)

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(male)

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(the same scene, with flash - I couldn't get quite the effect I wanted, with or without)

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(I think these were both males)

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(female, I think)

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(male)

I am pleased this species is doing so well locally.

Guy

Re: Padfield

Posted: Tue Aug 04, 2015 1:02 pm
by Padfield
Back home, a little sorry for herself ...

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I'm very glad the vet gave her a body suit, rather than one of those lampshades round the head, to stop her licking her stitches.

Guy

Re: Padfield

Posted: Thu Aug 06, 2015 3:20 pm
by Padfield
I was housebound yesterday, looking after Minnie, but took a local walk this afternoon on my own, when Minnie said it was too hot for her to do anything - the heatwave has returned with a vengeance.

The first thing of interest I discovered was a pair of white admiral caterpillars apparently happily cohabiting one honeysuckly leaf. Clearly, there were three here, as there are three eggs and three feeding stations, but currently there are just two caterpillars:

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Also interesting - but probably more so to me than readers of my diary - were several female short-tailed blues, drifting around and laying eggs. Some were on bird's foot trefoil, like this one:

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Others were more interested in this yellow medick species:

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I saw that last one at least oviposturing in heads of medick but didn't see any eggs. I never check plants while the female is still around.

There were also plenty of Provençal short-tailed blues flying. This is a male:

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Later, near my house, I spotted another short-tailed blue beetling across a meadow. Before this year I have never seen this species anywhere on my patch - the nearest site being in the valley, where I went a couple of days ago. So it was with great delight I followed this last blue and discovered there were many more. This female was nectaring on bird's foot trefoil but laid her eggs in clover heads:

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This is very good news. Short-tailed blue has been steadily on the increase in Switzerland for some years now. I saw my first Swiss individual in 2008 - and now I have them breeding in the meadow next to my house!

Guy

Re: Padfield

Posted: Thu Aug 06, 2015 3:27 pm
by Pete Eeles
Padfield wrote:The first thing of interest I discovered was a pair of white admiral caterpillars apparently happily cohabiting one honeysuckly leaf. Clearly, there were three here, as there are three eggs and three feeding stations, but currently there are just two caterpillars
Snap! I'll post my pics tomorrow (I need to get some decent habitat shots) but found a leaf containing 2 larvae, from 2 eggs, in different instars, and the youngest has created its own platform from the side of the leaf - same as yours! No cannibalism, and no moving leaf it would seem. I also found an egg (yet to hatch) on a leaf that already contains a larva, which I'll be keeping an eye on. The funny thing is, this was all on the same Honeysuckle spray, with 4 larvae and 1 egg sharing 3 leaves. Not the record though - which was 7 larvae spread across 3 sprays on the same plant, and within a foot of each other!

And I'm sure Minnie will get her own back in the afterlife :)

Cheers,

- Pete

Re: Padfield

Posted: Thu Aug 06, 2015 3:41 pm
by Padfield
You think it will be her sterilising me next time round? :D To be honest, I'm amazed how quickly she's recovered. She did a full walk in the cool of the evening yesterday, the day after having her uterus and ovaries removed ...

I look forward to your pictures, Pete. I should probably post habitat pictures of my white admiral egg spots.

On a complete tangent, I installed Windows 10 last night. I upgraded from 7 (having downgraded from 8, which I thought was totally rubbish) without any problems at all and without having to reinstall any programmes or even perform a backup. It's a much better OS than 8 and apart from a few annoying but correctable default settings (e.g., no hibernate on the power button, but you can add this from the control panel) at least as good as 7.

Guy

Re: Padfield

Posted: Thu Aug 06, 2015 3:47 pm
by Pete Eeles
Padfield wrote:You think it will be her sterilising me next time round? :D To be honest, I'm amazed how quickly she's recovered. She did a full walk in the cool of the evening yesterday, the day after having her uterus and ovaries removed ...
I do ... and glad to hear Minnie's recovering well!
Padfield wrote:I look forward to your pictures, Pete. I should probably post habitat pictures of my white admiral egg spots.

On a complete tangent, I installed Windows 10 last night. I upgraded from 7 (having downgraded from 8, which I thought was totally rubbish) without any problems at all and without having to reinstall any programmes or even perform a backup. It's a much better OS than 8 and apart from a few annoying but correctable default settings (e.g., no hibernate on the power button, but you can add this from the control panel) at least as good as 7.
As a Mac user, I'm very happy for you ;) Seriously, I expect that other Windows users will be pleased to hear this!

Cheers,

- Pete

Re: Padfield

Posted: Thu Aug 06, 2015 3:58 pm
by Goldie M
Hi! Guy, love your scenic shots, beautiful, I'm catching up on postings , Minnie up and about after her operation is good news, from experience she won't be too keen on going to the Vets anymore Goldie :D