Tag Archives: British butterflies

Marsh fritillaries

29 Saturday May 2021

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Having lucked out last week, I was over the moon during this week’s visit to Aberbargoed Grasslands NNR to see my first Marsh fritillaries of the year.

210529 marsh fritillary (1)

Perhaps it was the company of my friend Sharon that brought me luck (it was our first meeting in almost nine months).

210529 marsh fritillary (2)

And, no doubt, bumping in to the ranger on site really helped, as he pointed out which field he’d just seen half a dozen butterflies in (the main field where they’re usually seen is still very waterlogged).

210529 marsh fritillary (3)

The day of our visit was the first really sunny day in a while, and, as most of the fritillaries were sitting quietly amongst the tussocks and clumps of grass, soaking up the sunshine and flexing their wings, I got the feeling that many had only just emerged from their pupae.

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We saw nine Marsh fritillaries in total – I’m sure there were more we missed. They are such stunning creatures that I’m already planning a return visit.

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Oak: Purple hairstreak larva

26 Wednesday May 2021

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While examining the galls on Oak leaves that I blogged about yesterday, I also made a very exciting find, my first Purple hairstreak butterfly larva. It was so well camouflaged that I’m sure I wouldn’t normally have noticed it.

210526 purple hairstreak larva

This particular woodland contains some huge ancient Oak trees but also many younger trees planted to mark the turn of the millennium and I’ve always thought it would be good habitat for Purple hairstreak. Now that I know they’re definitely here, I’ll be looking for the stunning little butterflies when they emerge in a month or so, and also for more larvae in the meantime.

Butterfly courtship

24 Monday May 2021

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Some recent moments of butterfly courtship I’ve managed to catch on camera …
The dance of the Brimstones: the butter-yellow male flies in to check if the paler female is ready and willing to mate. And he’s in luck, so their (to human eyes) romantic dance begins, with the male whirling around the female, wafting his pheromones in her direction to encourage her to settle and let mating begin. This ‘dance’ can continue quite a while, as I discovered while watching this pair.

Mating was already underway when I spotted this pair of Green-veined whites. And it is not just sperm that is passing between them. The Butterfly Conservation website reports that the male also transfers ‘a so-called “nuptial gift” of nutrients that the female can assimilate and use to increase egg production. Exceptionally, male Green-veined Whites may transfer 25% of their own body mass to females during mating, though typically this is more like 15%.’

210524 green-veined whites

Sometimes males don’t know when to take ‘No’ for an answer! By pointing her abdomen in the air, this Orange-tip female is refusing to mate, presumably because she has already mated and needs to get on with the important task of egg-laying. But the male simply wasn’t getting the message and continued fluttering around the female, even landing on her outspread wings. Eventually, she flew off at speed to escape his advances.

First Common blue

21 Friday May 2021

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This has been a strange spring, with frequent cool winds, a lack of rain that was restricting plant growth and cracking the ground, and now a couple of weeks of frequent rain that is saturating the land. This unseasonal weather has had a definite effect on wildlife, with some insects out and about early, but others emerging a week or more later than usual.

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I would usually expect to see my first Common blue butterfly in mid May but this year’s first sighting came on Wednesday 19th and, somewhat surprisingly, it was high in the Welsh valleys, where the weather is often a few degrees cooler than my usual coastal patches. In fact, in between the sunny spells on Wednesday’s walk, I got hailed on. Go figure!

210522 common blue (1)

Brimstone eggs

04 Tuesday May 2021

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This was exciting – or should that be eggs-citing?!

210504 brimstone eggs (1)

I was watching this female Brimstone, first sitting on a patch of brambles, then flying, seemingly haphazardly, through and around bushes along a woodland ride. I thought those bushes were Blackthorn but it turns out they were probably Buckthorn.

210504 brimstone eggs (2)

Then I realised the butterfly was egg-laying. In his Life Cycles of British & Irish Butterflies, Peter Eeles describes the process:

Females are particularly choosy about the plants on which they lay their eggs – even on sites with many buckthorns present, only a very small proportion are used by females, who typically lay on plants that are isolated, sheltered and growing in sunny areas, such as at the edge of a woodland ride.

The eggs start off pale green, as shown here, but soon turn yellow and then grey, as the little caterpillar develops. This is the first time I’ve seen Brimstone eggs and I’m fairly sure I’ll be able to find them again so I’m hoping to keep an eye on their progress.

A Dingy surprise

24 Saturday Apr 2021

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Well, this was a surprise! My first Dingy skipper of 2021 flitted up from the ground as I walked a path at Cosmeston Lakes Country Park yesterday, settled briefly nearby, then floated off and promptly disappeared. Luckily, I managed to fire off a couple of quick shots, and I think these show how easily this little butterfly can ‘disappear’ in the landscape – it’s incredibly well camouflaged.

210424 dingy skipper

In my five and a half years in Britain, this is the earliest I’ve seen a Dingy skipper by at least a week, and my average first sighting has been a little later still, around the tenth of May. I presume our recent warm dry weather has led to these butterflies emerging earlier than usual, though the lack of rain could be an issue for them as the ground is very dry and the usual flush of spring wildflower growth delayed.

The blues are back

21 Wednesday Apr 2021

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There’s something quite startling about a tiny blue creature flying through your field of vision – it’s certainly eyecatching. I saw my first Holly blue of the year during Sunday’s meander but that one didn’t linger for a photograph. Yesterday, in a location where I didn’t see any last year, they were like buses – I saw four in total, including these two that floated in together.

210421 holly blue