This last weekend (5th - 8th September) was spent
on the Isle of Wight hoping for a well-earned rest and some good birding and mothing. The main purpose of the visit was to go to The Bestival to soak up some
of the atmosphere, enjoy a few beers and see a few bands…..but I won’t bore you
with that. We arrived at our caravan at Castlehaven at around 20:30 on Thursday
evening (5th September), so my first priority was to get my Robinson
moth trap on. The weather during the day had been hot and sunny and the
overnight temperatures were due to stay warm so I was hopeful of a good catch.
|
Jersey Tiger Euplagia quadripunctaria |
I popped out to check on
the trap before turning in, and it was buzzing. Moths were all over it, the
side of the caravan and the nearby bushes. With so many moths around I daren’t
open the trap and so spent my time looking around the outside. The first and
most obvious species was Jersey tiger, a species I have not trapped in my
garden before, but have seen at Titchfield Haven and previously on the European
mainland. The other species recorded included green carpet, dingy footman,
brimstone moth, oak hook tip and a single angle shades.
|
Male Four-spotted Footman Lithosia quadra |
|
Female Four-spotted Footman |
I woke early and ventured
out to check the trap, armed with a handful of pots and a cup of tea. The trap
was rammed and by the end I had recorded 343 moths of 66 species. The
highlights were two Jersey tigers, 45 whitepoints, 37 setaceous hebrew
characters, three four-spotted footman (2 males and 1 female), a cypress pug,
six mullein waves, three dark swordgrass, one Webb’s wainscot, a very large
dun-bar and a feathered gothic.
The temperature dropped
during Friday, and subsequently the moth numbers dropped too. This time we set
two traps, a 15w actinic and my 150w MV Robinson. Heavy overnight showers and a
moderate south-westerly breeze were not welcome, but by mid morning the sun was
out. The MV produced 66 moths of 25 species, with the highlights being crescent
dart, a species I have not seen before and another Webb’s wainscot.
Interestingly, the actinic trapped 53 moths of 25 species also, but the species
mix was very different. It included a broad-bordered yellow underwing, one
diamond back, two dark swordgrass, one rush veneer and a male four spotted
footman.
|
Crescent Dart Agrotis trux lunigera |
After the traps had been
emptied we went for a stroll around St Catherines Point in search of birds. We
were hoping for some migrants but a blackcap and whinchat was all that was on
offer. At sea there wasn't much going on either, and despite prolonged scanning
we only saw a few Balearic shearwaters, a dark phase arctic skua, a few fulmar
and an adult Mediterranean gull.
The weather overnight on
the 6th/7th was still cool and heavy overnight showers
made mothing questionable, but undeterred we progressed. Both the MV and the
actinic were again put on and we hoped for the best. The MV was again the most
productive trap and produced 122 moths of 45 species. The highlights were
cypress pug, pretty chalk carpet, single rush veneer and dark sworgrass, and an
immaculate clifden nonpareil. This is a species that I have never seen before
and found it difficult to contain my excitement at catching one.
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Clifden nonpareil Catocala fraxini - This moth was immaculate and very fresh it is hard to believe it could be in this condition after migrating from mainland Europe |
|
Clifden nonpareil - The under wing on this moth is quite stunning. |
|
Clifden nonpareil |
Clifden nonpareil is an
immigrant and transitory resident in the UK. It has one generation and is on
the wing through mid-August to mid-October. The larvae feed mainly on aspen but
in mainland Europe they have been recorded on other poplars.
By comparison the actinic
produced 122 moths of 45 species. The highlights being one Jersey tiger, a
gallium carpet, one rush veneer, 17 setaceous hebrew characters and 14
white-points.
|
Clifden nonpareil Underwing - in contrast to the previous moth, this individual was very tatty suggesting that it was a different moth |
We had a pre-dawn start on
Monday morning in order to get back in time for work and therefore had to check
the trap in the dark. We did not record the numbers of moths, just the number
of species in the MV only. In total we recorded 22 species, the unquestionable
highlight was another clifden nonpareil. This individual was not in the same
condition as the previous nights moth, and therefore the presumption was that
it was a different individual….amazing two in two nights!
Overall in the two traps, and despite the weather, we caught 674 moths of 80 species, including several migrants and a few species that I had not seen before.