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Painted Lady migration

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Old Monday 15th July 2019, 19:19   #1
andyadcock
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Painted Lady migration

'The Great butterly adventure', looking at the longest butterfly migration which sees insects travel from Africa to the UK.

Tonight at 9 on BBC4
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Old Tuesday 16th July 2019, 22:36   #2
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Thanks just started to download
Over 13 well worn Painted Ladies here in the Pyrenees
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Old Wednesday 17th July 2019, 17:20   #3
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A very interesting programme and we learned that one of the drivers for the species mass, migration from Morocco, is escape from a parasitic wasp that preys on the larvae.
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Old Wednesday 17th July 2019, 17:52   #4
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Originally Posted by andyadcock View Post
A very interesting programme and we learned that one of the drivers for the species mass, migration from Morocco, is escape from a parasitic wasp that preys on the larvae.
Possibly. It's mentioned but they don't actually present the evidence as such [it's "ground-breaking" and so we probably wouldn't be able to understand it if they did...]. It's probable in this case because [from memory] population dynamics of several British species exhibit strong cycles that seem linked to their parasitoid abundances. Here's a link to a ScienceDaily piece about the longest migration
https://www.sciencedaily.com/release...0613102004.htm
[Odd(?) that the programme's from 2016 but this is from 2018]

...Should also have added (and I don't think this is in the programme), painted lady has the largest known number of host plants for any butterfly: >300. This partly explains why it's so widespread...

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Old Wednesday 17th July 2019, 18:26   #5
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Possibly. It's mentioned but they don't actually present the evidence as such [it's "ground-breaking" and so we probably wouldn't be able to understand it if they did...]. It's probable in this case because [from memory] population dynamics of several British species exhibit strong cycles that seem linked to their parasitoid abundances. Here's a link to a ScienceDaily piece about the longest migration
https://www.sciencedaily.com/release...0613102004.htm
[Odd(?) that the programme's from 2016 but this is from 2018]

...Should also have added (and I don't think this is in the programme), painted lady has the largest known number of host plants for any butterfly: >300. This partly explains why it's so widespread...
Did you watch it until the end?

Unless I misunderstood,the guy who was studying them said he was preparing a paper and that he was confident he'd proved it. He even collected samples of Painted Lady larvae from Morrocco which all had wasp larvae in them?
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Old Wednesday 17th July 2019, 21:49   #6
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Painted Lady 500 feet up the South slope above the road in the Bwlch, Gwynedd, today doing its best to head South-west against a very stiff breeze.

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Old Wednesday 17th July 2019, 22:56   #7
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Did you watch it until the end?

Unless I misunderstood,the guy who was studying them said he was preparing a paper and that he was confident he'd proved it. He even collected samples of Painted Lady larvae from Morrocco which all had wasp larvae in them?
I had a look at his list of publications back to 2009 on at least one of his websites and there was nothing obvious on a quick look. In the film there was mention of 100 larvae I think, but no clear formal discussion of exactly what was found. These larvae are colonial and 100 might only mean 10 (or even fewer) groups. Even if parasitism rates were 100% that still might not amount to much more than some anecdotal evidence. As an (ex) scientist, I always hope for more in-depth discussion of exactly what evidence there is, how it was analysed and whether I agree with the conclusions drawn. Unfortunately, the program fell far short of my hopes (if not my expectations) in that respect. The other experimental evidence they presented for the rothamstead work was far better.
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Old Thursday 18th July 2019, 21:21   #8
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I watched for a while but did not like the research methods
I identify Butterflies with a camera To use a net for me is a no no
The use of super glue and rubbing of scales was to much never shorten the life of any creature
Would humans like to be treated this way just to find they are looking for food and avoiding birth place problems
I really do not care were they come from and what they do its harmless to me

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Old Wednesday 31st July 2019, 10:27   #9
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I saw a few counts of 40-50 Painted ladies in the south-west UK a couple of weeks ago, but other than that, numbers weren't that much above normal and seemed to quickly disappear. However, I noticed one comment from Northumberland last week of 'hundreds arriving' and I see there was a count of 1500 on one of the Northumberland Islands recently (can't remember if it was Farnes or Lindisfarne). Any other arrivals east coast that I missed?
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Old Wednesday 31st July 2019, 13:22   #10
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At the end of June we saw lots of Painted Ladies on North Uist in the Western Isles. By lots I mean we saw singles and twos every half-hour on most days. Also, the Bird Blog on Islay reports 'an explosion' of Painted Ladies on July 30th.

Lee

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Old Friday 2nd August 2019, 19:57   #11
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3+ absolutely fresh Painted Ladies on my Buddleia in Farnborough today, none in the last couple of weeks (though Commas, Peacocks, Small Tortoiseshells and Red Admirals among others).

I guess a new generation is now on the wing.

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Old Saturday 3rd August 2019, 04:01   #12
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Certainly been some fresh immigration this week with huge numbers in the north-east. Saw a video of them swarming all over the Farnes + photos from other locations. Also saw a photo of many in Somerset.

Here in London I saw just one on a Budddleja in a garden in Richmond Park, my first for a couple of weeks.
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Old Saturday 3rd August 2019, 06:13   #13
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I'm hearing there were a thousand on St Mary's, Scilly, yesterday.
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Old Saturday 3rd August 2019, 09:07   #14
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Saw my first yesterday on sandy path adjacent to Chingford Golf Course.

Cheers
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Old Saturday 3rd August 2019, 09:13   #15
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I've had up to a dozen on my Buddleia bushes this week. A month or so previously there were lots of worn individuals passing through the area.
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