01 Friday Apr 2022
This pale lime beauty was my sixteenth Brimstone of the year (I saw my first on 27 February) but she was the first female, and the first to stay still long enough for a few photos. Male Brimstones usually emerge first from their winter hibernation (as adults) and can be seen flying purposefully up and down hedgerows, footpath edges and woodland rides, searching for females, which emerge a little later than their male suitors.
07 Tuesday Dec 2021
Posted in insects
Tags
Brimstone, Brimstone butterfly, Brimstone caterpillars, Brimstone eggs, British butterflies, butterfly
Of course, my end-of-year countdown has to include butterflies. Today it’s the Brimstone – there may be others.
I was thrilled this year to discover more about the life cycle of this exquisite butterfly. In May, after watching a female laying on the leaves of Buckthorn saplings, I found my first Brimstone eggs and, after that, knowing what Buckthorn looked like, found many more and, of course, lots of lovely caterpillars in various stages of development. I’ve yet to find a chrysalis though – maybe next year.
21 Monday Jun 2021
Posted in insects
Tags
Brimstone, Brimstone butterfly, Brimstone caterpillars, Brimstone larvae, British butterflies, butterfly reproduction
We’ve watched Brimstone courtship (Butterfly courtship, 24 May 2021) and we’ve seen Brimstone eggs (4 May 2021), now let’s have a look at what hatched out of those eggs, the Brimstone babies … well, we might want to call them caterpillars or, more scientifically correct, larvae, but I couldn’t resist the alliteration of that title.
According to Peter Eeles’s Life Cycles of British & Irish Butterflies, the Brimstone butterfly progresses through five stages, called instars, taking around 25 days from the day it hatches from its egg to the time it moults into its final instar. Six days after that, it pupates. By returning to Buckthorn trees where I’ve previously seen eggs, I’ve managed to find most of these stages, including, on Saturday, a final instar.
Eeles writes that, as early instars, the larvae tend ‘to rest alongside a rib on the leaf underside’ (shown in my first two photos) but from the third instar, ‘the larva now rests on the leaf upperside’ (above). In its final instar the larva has a typical resting pose, where it almost hangs off the leaf (below left), and it ‘exudes an amber liquid from the tips of the fine hairs that cover its body … This liquid may be distasteful to birds and therefore act as a deterrent’. The tiny orange globules can be seen in the photo below right. Now to find a pupa …
24 Monday May 2021
Posted in insects
Tags
Brimstone butterfly, British butterflies, butterfly courtship, butterfly mating, Green-veined white butterfly, Orange-tip butterfly
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%.’
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.
04 Tuesday May 2021
Posted in insects
This was exciting – or should that be eggs-citing?!
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.
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.
17 Wednesday Mar 2021
Though yesterday’s weren’t my first butterfly sightings of the year (I’ve seen two different species fly rapidly past in recent weeks but haven’t managed photos), they were simply splendid. A walk around Cardiff’s Grangemoor Park produced five (!) Brimstones and, though most were patrolling their chosen territories at speed, I waited patiently for one to stop for a rest and managed to get close enough to get some good images. I can’t tell you how truly wonderful it feels to be sharing my air space with butterflies again. They are such magical creatures!
26 Thursday Mar 2020
Posted in insects, nature, spring, wildflowers
Tags
Brimstone, Brimstone butterfly, British butterflies, British wildflowers, dandelion, Gonepteryx rhamni, Grangemoor Park
Here’s why it should be an offence to cut, spray or otherwise destroy blooming wildflowers – in this case, Dandelions, in particular.
During yesterday’s daily exercise walk around Grangemoor Park I saw at least five Brimstone butterflies. These were all males, newly emerged from hibernation and already flying frantically back and forth along their chosen path-sides and hedgerows, seeking out females to mate with.
As there aren’t yet many wildflowers in bloom at Grangemoor, when it came time to refuel for their next patrol flight, every single one of these Brimstones stopped and supped on Dandelion nectar. In fact, once I twigged to what they were doing, I took to checking every Dandelion I saw, just in case it held a butterfly. So, please, PLEASE, leave your Dandelions for the insects to feed on.
20 Monday May 2019
Posted in 365DaysWildin2019, insects, nature
Tags
#365DaysWild, Brimstone, Brimstone butterfly, British butterflies, butterfly, butterfly courtship, male butterflies contesting a female
This female Brimstone butterfly is minding her own business, having a drink, and has no idea she is about to be tackled from behind by two male Brimstones.
After some mid-air tussling, she lands on a leaf and seems receptive to mating but which male will get to do the honours?
The males engage in an aerial battle, while she waits with closed wings.
The dominant male lands next to the female and seems to try to force her wings apart.
She opens her wings and you can almost see the glint in his eye!
But, before he has time to mount the female, the second male returns to try his luck once more. The female closes her wings and the male tries again to force them open.
Now both males are holding her wings down but they continue to battle over who is dominant.
More male tussling follows, at which point the female gets fed up with waiting and flies off, the two males in hot pursuit.
15 Wednesday May 2019
Tags
Brimstone butterfly, British butterflies, Green hairstreak, Kent butterflies, Peacock butterfly, Small copper, Wall brown, Wall butterfly
I was hoping to see several different butterfly species during our days in Kent but the weather was mostly against us – we had, at various times, gale-force winds, squally rain showers, and batterings of hail, and it was generally quite cool. I was quite hopeful, though, when we arrived at Cliffe Pools on our last day, as the sun came out to play and the paths were mostly enclosed by sheltering trees and low scrub. It was by sheer chance, though, that I managed to spot my first ever Green hairstreaks – two butterflies were swirling around each other, disputing territory, and I immediately realised they were something different.
Luckily, I kept an eye on them, as their camouflage is so good that they’re incredibly difficult to spot once they’ve landed on a bush.
Plus, they often do this thing where they angle their wings to one side, presumably to make themselves look even more like a leaf.
I also saw my first Wall brown butterfly for the year at Cliffe Pools – this was the species I’d seen reports of and was particularly looking for there.
At the RSPB nature reserve at Dungeness I also saw my first Small copper for 2019.
And during the rest of our trip we also saw Peacock, Brimstone, Holly blue, and some of the White species – not a lot really but, though I didn’t get the quantity I expected, we certainly saw quality butterflies.
07 Sunday Apr 2019
Posted in 365DaysWildin2019, insects, nature, spring
Tags
Brimstone butterfly, British butterflies, butterfly, Grangemoor Park, Green-veined white butterfly, Orange-tip butterfly, Peacock butterfly
I took myself along to Grangemoor Park today, hoping its central hillock would block the cool north-easterly winds so that I might find some butterflies on the warmer, sheltered, river side … and I did. The three Orange-tips – all males – were my first of the year, as was the single Green-veined white (at least, I think it’s a Green-veined white – I do find the whites can be a little confusing).
The four Peacocks were mostly too zippy to photograph, until I caught one enjoying the sunshine on a wooden railing. And the two Brimstones were also speeding along the edge of the pathways, until one stopped to refuel and I managed to grab a couple of snaps of it. I love butterflies!
earthstar 
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