I have mentioned the biodiversity issues on one of our local fenland drains, known as the Cottenham Lode. Over the last couple of years several of us have seen Brassy Longhorn moths feeding on the Field Scabious that grows on the lode bank at the dogleg near the footbridge into the woodland at Rampton. There has been a problem with the time of the mowing of the Lode bank, which is done each year by the Environment Agency for flood risk reduction an important maintenance job, obviously.
Brassy Longhorn feeding on Field Scabious on the Cottenham Lode
The mowing is usually done in two stages a strip towards the top of the bank is mown fairly early in the summer and the lower strip and the upper strip are then mown completely towards the end of July. Unfortunately, that full cut takes with it all the field scabious flowers, which are still blooming and with it the insect life that had until that point been thriving on the flowers. It is a crying shame one might say, especially in an age when conservation and biodiversity are high on the agenda.
I have great news to report. I have been in discussions with the Environment Agency who have now agreed to defer the first cut of the lode bank until no earlier than the week commencing 16th August this year and a similar date for future years. This means that the second, full, which takes in all of the lower part where the field scabious grow will be later still.
This will hopefully give the insect life and the wildflowers a better chance before the blades fall on them each year. So thank you to Alex Malcolm and Neil Stuttle at the EA for listening to my argument and finding a solution.
Earlier in the year, I bought myself a summer of moths – a pack of pheromone lures with which to entice clearwing moths into the garden, with a view to grabbing a quick photo opportunity and letting them on their way to find a mate etc.
Regular readers will recall I have mentioned pheromone lures before in the context of the Emperor moth. The clearwings are a very different group and I’ve not had time to find out much detail about the chemistry of their pheromone attactants. Regardless, I have been putting out a lure, known as “myo” for the Red-belted Clearwing (,em>Synanthedon myopaeformis).
Usually, I hang the lure in the back garden and have had no luck, but on a whim, today I put it in the front garden and within about ten minutes, a RbCw turned up. The specimen was a lot smaller than I was anticipating, but checking in my “Collins”, I see that it is a rather small moth, with a wingspan of 19-24 mm. I’d say this one was on the lower end of that size scale. Beautiful creature, obviously belted and see-through wings. If you didn’t know, you might guess at it being some kind of wasp-type insect. But, definitely no sting in the tail of this one.
The species flies June to August but is rarely seen except by those with a pheromone lure for citizen science purposes. The larvae live under the bark of old apple, and other fruit trees such as pear and almond. Got the best snaps I could of this rather skittish specimen so I could let him back into the wild sooner, rather than later.
This tiny little micro moth known as Aethes tesserana is a mere 5 millimetres long. It was drawn to a 40W actinic lamp in our garden on Sunday evening (2021-06-06). It was a still and balmy evening, I seem to remember.
Incidentally, not all the micro moths are tiny, some of them are bigger than the macro moths, some of them are huge. The distinction between micro and macro is now understood to be about evolutionary history rather than size. All the butterflies sit in the micro moth grouping, being just a specific group within the moth family.
A. tesserana does have a trivial, vernacular name, it’s sometimes called the Downland Conch, and is listed as such on iRecord. However, these vernacular names are rarely official when it comes to the micro moths and indeed are frowned upon in many cases by moth-ers and lepidopterists because they are inconsistent and the scientific binomials are preferred to avoid ambiguity.
Meanwhile, some long-form reading matter for you (a book, in other words) – Much Ado About Mothing.
For a lot of people, moths are tiny, fluttery creatures that turn to dust if you try to catch them and whose caterpillars can chew through their vegetable patch, their prize perennials, and even their carpets and clothes. Now, there are pest species, admittedly, and these can to some extent be controlled in appropriate conditions. However, for those who have been initiated into the wonders of the Lepidoptera, the 180,000 different species around the world are a natural wonder to behold.
Some of the Sciencebase mothing kit
For those of us who do get hooked on moths – we call ourselves “moth-ers” by the way – it can become an obsession that persists from the first very first lep sighting. For those who insist that moths and butterflies are somehow different, and that butterflies are far more beautiful and far more worthy of our attention, it’s worth pointing out that all butterflies are just a single group within the Lepidoptera.
Emperor
The other groups include the noctuids (also known as owlets), the geometers (their caterpillars, larvae, measure the earth, they’re the inchworms), the sphinx moths (also known in the British Isles as the hawk-moths), and several others. Butterflies are merely one such group among the moths. Moreover, they’re actually just one group within the so-called “micro moths” (nothing to do with size, everything to do with their place on the evolutionary tree).
Gypsy Moth
It’s complicated, and all moth-ers come to the obsession through a different route. In his wonderful new book, Much Ado About Mothing, James Lowen, challenges all those dusty preconceptions about moths. He takes us on a lavish and circuitous route around the UK searching for the rarest and most intriguing of our scaly-winged insects. Incidentally, of the 180000 worldwide species a mere 2500 or so are found in the UK, some of them migrants and rare visitors.
Clifden Nonpareil
With Lowen, we clamber up mountains, we wade through marshes, and we look for what lurks in the wood and on the trees in ancient woodland. What we find is an incredibly diverse group of animals, all of them sharing common features but each very different from the next. Lowen shows us just what most people seem to miss about moths – their natural beauty.
Gold Spot
Mothing, as a hobby, is on the rise. It has often been a parallel hobby for birders, one that can be done with lures and lighttrap or even just a white sheet and a bright torch, in one’s own back garden or a local patch of countryside, and…even right in the centre of the city! Your mileage may vary on what you find, but each mothing experience brings new delights, and a new hope that the next lep to turn up will be one of the rarest of the rare or perhaps even one once thought extinct that turns out to be very much extant.
Cinnabar
If you are not yet convinced, then delve into Lowen’s book, it will astonish and intrigue even the hardiest of mottephobe, I am sure. And, remember butterflies are just one group within the moth family…and who doesn’t like butterflies?
Pale Tussock
If you love or loathe lepidoptera buy this book, Lowen’s wonderful enthusiasm will give you a mental boost either way and if you were indifferent to the scaly-winged insects, it might even let an interest pupate and to take to the air.
This is a Spring moth known as a Lead-coloured Drab, Orthosia populeti, fairly certain of the ID, I couldn’t check the degree of featheriness on the antennae to be certain, it may be a different type of Drab. Its markings are not particularly remarkable, but its hairy compound eyes can be something of a talking point.
The macro shot of the moth’s left eye was taken with my camera mounted on a tripod very close to the moth. I used manual focusing in “live view” mode (i.e. focusing with the camera’s rear screen. I set the shutter to “silent” mode on put it on a 10-second timer to minimise vibration.
The camera in question is a Canon 7D mkii digital SLR (2/3 cropped frame). It was fitted with a 1:1 90mm Tamron macro lens and a 44mm extension tube to allow focusing closer than the Tamron’s standard minimum focusing distance.
Shot was taken as a 2-second exposure, with an aperture of f/7.1, and ISO 200. No flash, just ambient light and a line of LEDs about 2 inches above the moth.
I have counted well over 300 species of moth in our garden this year(almost 9000 specimens), mostly at night, although there were one or two dayflyers (excluding butterflies, which are moths but are not usually listed as such). That is a small fraction of the total number of moth species listed in the British Isles which tallies at 2500 or thereabouts, 180,000 species of lepidoptera globally.
Of those 300 or so species about 30 were new to me having not ticked them in the garden before. Here’s a small selection starting with the rarest, the Clifden Nonpareil, a moth that was extinct in The British Isles by the middle of the twentieth century but is making a comeback.
Clifden NonpareilFigure of EightyGypsy MothPine Hawk-moth
Dark Crimson UnderwingThe LackeyScarce Bordered Straw
UPDATE: Greece, June 2024 – Added Catocala nymphaea to my list of photographed Erebid “underwings”.
UPDATE: New Forest, 25 Aug 2022 – I finally trapped the Light Crimson Underwing (Catocala promissa) at our holiday house in North Poulner, Hampshire, which completes the British set for me, I believe. There’s a short video clip of the LCUW on the Sciencebase Instagram, with Going to the Chapel as the background music for good reason.* In the summer of 2023, Adrian Matthews caught an LCUW in Chesterton, a first for Cambs.
Light Crimson Underwing, Catocala promissa
The Catocala moths are a group of relatively large moths in the family Erebidae. They are often known as “underwing moths” because of the intriguing colours and patterns of their hindwings, which are usually hidden from view under the forewings while the moths are at rest and only revealed either in flight or when the insect is startled.
Not to be confused with dozens of others species in the Noctuidae that have the word underwing as part of their common name (e.g. Yellow Underwing, Straw Underwing, etc) and Geometridae (Orange Underwing).
Clifden Nonpareil, Catocala fraxini, the Blue Underwing
These large Catocala underwings are not common in The British Isles and where they are known are often localised to particular niches. In my time mothing since late July 2018, I have trapped, photographed and released three of the group: Red Underwing, Dark Crimson Underwing, and the (once extinct here) Clifden Nonpareil (the Blue Underwing). Actually, I had the Red in the garden in 2019 and then saw it a few days later on a camping trip to the eastern coast of Norfolk.
Red Underwing, Catocala nupta
I am yet to see the Oak Yellow Underwing, the Rosy Underwing, the Minsmere Red Underwing, or the French Red Underwing. There are 30 Catocala species in Europe and 250 globally.
Red Underwing, Catocala nupta, wings hiddenDark Crimson Underwing, Catocala sponsaDark Crimson Underwing, Catocala sponsa, camouflaged on mottled bark
*Interesting to note that they all have scientific names alluding to nuptials and wedding nights. The naturalists who named them, whimsically imagining that the brightly coloured hindwings were like a bride’s brightly coloured bloomers! So we have C. sponsa, C. nuptia, and C. promissa. The Clifden Nonpareil is the exception, its scientific name, C. fraxini, alluding to the ash tree, wholly inappropriately as its food plant is the aspen.
More moths, birds, and other nature shots via the Sciencebase Instagram, please join me there.
UPDATE: The news kept getting better and while things are not quite back to normal and never will be, all of those involved are in a much better place than they were at the beginning of October.
It has been a traumatic week an emotional rollercoaster to coin a cliche, you might say. There is a more positive outlook this week than there was this time last week, so I am now doing a little bit of a celebration of life with some of the interesting and intriguing species Mrs Sciencebase and I have seen this year on our rather lockdown-limited excursions.
Short-eared Owl, NT Burwell Fen – January 2020Pipistrelle Bat day-flying along the edge of Rampton Spinney, February 2020
Female Goosander on The River Tyne near Ryton, March 2020
Emperor Moth, Cottenham – April 2020Longhorn Moths, Rampton Spinney – April 2020Wren, Cottenham – April 2020Kingfisher, Wilburton – April 2020Common Frogs, Cottenham – May 2020Mimulus, Cottenham – May 2020Figure of Eighty moth, Cottenham – May 2020Curlew, Cley, Norfolk – May 2020Red Kite, Snettisham – June 2020Ringlet, Snettisham, Norfolk – June 2020Brassy Longhorn, Cottenham Lode – June 2020Corncockle, Cottenham – June 2020Female Red-footed Falcon, RSPB Fen Drayton – June 2020Pyramidal Orchid, Les King Wood, Cottenham – June 2020Sandwich Tern, Hunstanton – July 2020Fulmar, Hunstanton – July 2020Spreading Hedge Parsley, Cottenham – July 2020Silver-washed Fritillary, Hayley Woods, Cambridgeshire – July 2020Rather blurry shot of a Clouded Yellow at Hayley Woods – August 2020Bittern, RSPB Ouse Fen – August 2020Hare, Cottenham Allotments – August 2020Hobby, Wilburton – August 2020Dark Crimson Underwing, Cottenham – August 2020Osprey, Rutland Water – August 2020Gypsy Moth, Cottenham – August 2020Little Owl, Les King Wood, Cottenham – August 2020Clifden Nonpareil, Cottenham – September 2020Grounded Kestrel, Rampton Spinney – October 2020First Merveille du Jour of the year – October 2020
Clifden Nonpareil – For the incomparable moth from Clivedon House, blue is the colour!
Blue is not a common colour in British moths
The UK Moths website described Catocala fraxini as the Victorian collector’s classic all-time favourite”. It also goes by the name of the Blue Underwing because of the shock of blue on the hindwings, which are usually covered by the forewings when the moth is at rest and are exposed when it reacts to a threat.
C fraxini feeds on aspen rather than ash (the frax of its name)
The moth was well known in the British Isles in Kent and Norfolk until the middle part of the the 20th century, the site explains, but it ultimately became extinct in terms of being a breeding resident on these shores and was seen only occasionally by lepidopterists as a vagrant immigrant from the continental mainland.
C.fraxini on an NCL rule for scale
Thankfully, the species has been gaining new traction in the South of England and in East Anglia. It is now thoughtto be recolonising and is almost certainly breeding in the south. As an amateur moth-er, I hoped to draw this species beyond compare to the actinic lure I light up some nights in our Cambridgeshire garden. I didn’t hold out much hope until I heard on the mothing grapevine that there had been one or two sighted in neighbouring counties.
Blue Underwing with my secondhand copy of Manley behind
Then, in the middle of August, a fellow moth-er at the other end of our village here, reported a sighting of a Clifden in his garden. At the time, the closest I came to the fabled Blue, was another Catocala species, the Dark Crimson Underwing, that came to the actinic lure (it’s just a UV lamp, by the way). The Dark Crimson is usually confined to the New Forest, I was happy to see it.
A couple of weeks later my village friend reported a second Blue and his own NFG (new for the garden) Dark Crimson. I had my fingers crossed as tightly as they can be, but no luck. The autumn kicked, in then a mini-heatwave or two. There were endless Large Yellow Underwings (which are unrelated to the Catocala species, being Noctuidae rather than Eribidae. There were also lots of Lunar Underwings, yet another noctuid with veiny forewings and a moon-like crescent on each hindwing. Lots of Square-spot Rustics too and the Black Rustics of autumn. But no Blue.
Finally, on the night of 28th September at about 22h50, I let the dog into the garden for her late-night ablutions and checked the actinic lure, immediately spotting lots of craneflies on the adjacent wall, a Lunar Underwing on the box itself and…oh…there…an enormous speckled, patterned, grey moth with its shimmering band of blue on each hindwing exposed when the moth is disturbed. It truly is beyond compare, nonpareil.
This specimen was a little battered by the time it reached my lure. It is about 48 mm from palps to the tip of its folded forewings. The books describe it by wingspan which can be 80 to 90 mm. For a British species, it is truly enormous and impressive, not quite as big as our largest resident the Privet Hawk-moth which can be up to 120mm when its wings are fully expressed.
With Covid-19 lockdown hitting some people very hard, it seems churlish to complain about its effects on me. It felt hard – no pub visits with friends, no limited time outdoors and so not much chance for nature photography and long walks with the dog, no rehearsing with C5 The Band nor the TyrannoChorus choir, no panto to plan for etc, like I say, relatively easy, but still hard.
Dark Crimson Underwing
As such, I was really hoping for an exciting moth year to keep me sane, and I have had some crackers, but numbers and diversity seem to have been low…all I’ve really seen for the last couple of weeks are quite a few Large Yellow Underwings and Square Spot Rustics and little else.. They’re of interest in their own right, of course, but once you’ve seen a few dozen, you’ve seen them all.
Gypsy Moth
I am yet to see the so-called Blue Underwing, the Clifden Nonpareil, a beautiful and fascinating European species that seems to be spreading northwards (I hear they’ve been ticked in Shropshire now). It’s odd a fellow moth-er in this village had two of these a couple of weeks ago. I did see its relative the Dark Crimson Underwing a month before he did. That species is usually only seen in the New Forest but is also spreading its wings so to speak.
UPDATE: Clifden Nonpareil actually turned up at the end of September.
Clifden NonpareilFigure of Eighty
Anyway, without going into all the statistical detail of 250 or so species I’ve noted this year so far more than 30 of them were new for the garden (NFG), new to me (NTM), in fact, I’d not seen them live before. Where a name has “agg” that means aggregate and it is to mark those species that look superficially identical to others and cannot be separated into distinct species without dissection or DNA analysis.
