Accent Gem – 2nd British record

An ultra-rare immigrant moth, the Accent Gem Ctenoplusia accentifera, has been spotted in Devon. This African species has only been recorded in Britain once before , way back in 1969 in Kent, so the discovery is very significant.

Devon Moth Group member, Dave Wall, found the moth in his garden moth trap in Exmouth on 29 October, during a major period of moth immigration to the southern coast of Britain that accompanied very mild weather and southerly winds. In fact, in the same moth trap, Dave also caught two Palpita vitrealis and three Vestal Rhodometra sacraria, quite exciting immigrant moths themselves.

This is the second extremely rare migrant moth caught in Devon in recent months. Back in July, Group members found a Ringed Border Stegania cararia, which was also a species never seen before in Devon and was only the third known British record.

Accent Gem caught at Exmouth 29 Oct 2014 (image by Barry Henwood)_1

Migration month

Autumn can be a time of great excitement for Devon’s moth recorders as moth migrate northwards from the continent and arrive on our shores. In some years, little arrives but in others (most recently 2013 and 2011) an amazing variety of common, scarce and downright rare immigrant moths come in, to the delight of wildlife enthusiasts.

So far this year, most of the migrant moth excitement has been among moth recorders on the east coast of Britain. However, the South West hasn’t missed out entirely. Perhaps the pick of the crop so far have been two records of the large and dramatic Clifden Nonpareil (Catocala fraxini) – a moth that would feature on most moth recorders’ bucket lists. The first was caught by visiting moth expert Dave Grundy at Prawle Point on 27 August, while the second came to Mike Lockyear’s moth trap in Crediton on 17 September. Both are shown below. The species has also been reported from other locations around the English coast from Dorset to Northumberland in the past few weeks.

A range of other immigrants have been seen in Devon in recent weeks including the massive Convolvulous Hawk-moth, Delicate, Vestal, Scarce Bordered Straw and Ostrinia nubilalis.

With mild conditions forecast for the week ahead, it would be well worth looking out for rare visitors to our county.

Clifden Nonpareil (Dave Grundy)

Clifden Nonpareil (Dave Grundy)

Clifden Nonpareil (Mike Lockyear)

Clifden Nonpareil (Mike Lockyear)

Ringed Border seen in Devon!!!

An extremely rare migrant moth, the Ringed Border, was discovered by Devon Moth Group members at our field meeting at Parke near Bovey Tracey on Friday night. This is the first time the moth has ever been seen in Devon and possibly only the third ever sighting for mainland Britain.

Although there have been a number of common immigrant moths arriving into Devon during the recent spell of hot weather, the stunned moth recorders, led by former Devon County Moth Recorder Roy McCormick and National Trust ranger Fred Hutt, could hardly believe their eyes when the moth was spotted at the light traps just after midnight. The only previous British sightings were of one in Somerset in 2009 and one in Hampshire in 2010. The amazing find just proves that you never know what you’ll find in your moth trap!

Ringed Border caught at Parke on 25 July 2014

Ringed Border caught at Parke on 25 July 2014

Sloe Pug spreading in Devon?

Sloe Pug Pasiphila chloerata has an interesting history in Britain. Due to its close similarity to the very common Green Pug P. rectangulata, Sloe Pug wasn’t discovered in Britain until 1971, although it had undoubtedly been resident for a long time.

It is now known to be a widespread moth, found as far north as Cumbria, but it does not seem to occur in the far west of England or Wales.  There are very few Devon records and until recently it was thought to be confined to the far eastern edge of the county along the Dorset border.

However, last year confirmed records of Sloe Pug were received from Exmouth and  Orley Common, Ipplepen (near Newton Abbot), greatly extending the known range of the moth westwards.

Most recently, Barry Henwood, the County Moth Recorder, caught a Sloe Pug (shown below) in his garden at Abbotskerswell (only a few miles from Orley Common) on 1st June 2014, raising the possibility that the moth is spreading and may now be more widespread in the county.

Sloe Pug in Devon (June 2014) (Barry Henwood)

Sloe Pug in Devon (June 2014) (Barry Henwood)

It is possible to distinguish Sloe Pug and Green Pug on external characters. The adults of both species are greenish, fading with age. When fresh, Green Pug is brighter green. The first difference to notice is that the postmedian line of the Green Pug has a jagged appearance (with two strong angulations), whereas the same line on Sloe Pug is more of a gentle curve. Sloe Pug has a brick-red ‘belt’ on the base of the abdomen, which Green Pug does not have.

Once you think you have a candidate for Sloe Pug, put it in a jar and look through the glass at the underside of the hindwing. There the post-median line forms an acute angle in Green Pug but an obtuse angle in Sloe Pug.

Further Devon records accompanied by good photos of upper-side and under-side (through glass) would be very welcome.

Eggciting moths

The Small Eggar Eriogaster lanestrisis a particularly prized spring moth in Devon. Not only is it an attractive species (see pic below), it is also a scarce moth in the county and a difficult one to see as it flies early in the year.

There are only eight previous records of adult Small Eggars in the Devon Moth Group database this century; sightings of the caterpillars which live in large silken nests on bushes and trees are more common.

This year, amazingly, Small Eggar adults were recorded in two different places in mid-Devon on the same night (31 March) by Group members. Paul Butter recorded one in his moth trap near Okehampton, while Stella Beavan found two in her trap at Zeal Monachorum.

Just goes to show that there are great rewards for those who keep recording moths through the colder months of the year.

Small Eggar (Stella Beavan)

Small Eggar (Stella Beavan)

Annual report for 2013 published

Devon moth report 2013 front cover_2Devon Moth Group’s report on moth goings on in the county during last year has been published and is being circulated to members.

It reports on a year of two contrasting halves – a cold first six months with disappointing moth numbers and then, starting with the heatwave in July, am excellent second half of the year with bumper catches in moth traps and an exciting autumn immigration that bought scarce, exotic moths to our shores.

Nearly 43,000 moth records were submitted for 2013 by Group members and other recorders – a big increase on the number for the wet summer of 2012 and the second highest annual total ever received by Devon Moth Group. Many thanks to everyone who let us know about their sightings!

The Annual Report contains a full list of all the moth species (micros and macros) recorded in Devon during 2013 together with commentry on notable sightings and migrants by the County Recorder, Barry Henwood, and micro-moth expert Bob Heckford.

Migrant moths

Autumn is typically an exciting time of the year for those interested in moths. Although the great diversity of British moths that are around during the warm summer months is starting to fade, it is the peak time of year for moth immigration.

In good autumns, such as in 2011, huge numbers of moths can arrive in Britain from southern Europe or even North Africa, borne in on warm southerly winds. While some of these are common and familiar migrants such as the Silver Y, Dark Swordgrass and Humming-bird Hawk-moth, other much rarer and more exotic-looking species can arrive, such as the sinister Death’s Head Hawk-moth, the stunning Crimson Speckled, Dewick’s Plusia and Purple Marbled.

The number of exicitng immigrant moths has started to rise in Devon and neighbouring counties in recent weeks with, for example, sightings of the very rare Rosy Underwing in Dorset and Cornwall. This species had only been recorded 10 times ever in Britain prior to this year, but there have already been three sightings in recent weeks (two in south Dorset and one on the Lizard, Cornwall).

I’ve not been lucky enough to see anything so rare (although with moth recording one always lives in hope) but have seen several immigrant Vestal moths in my garden in the last two weeks (one shown below). It’s well worth putting your moth trap out at night between the showers and also keeping your eyes peeled during the day as species such as Convolvulus Hawk-moth and Crimson Speckled are often spotted by day.

Vestal (Richard Fox)

Vestal (Richard Fox)

Moth bonanza at Marsland

Our recent field meeting at Devon Wildlife Trust’s Marsland nature reserve near Bude coincided with one of the best periods for moth trapping since the last decent summer, back in 2006.

A fantastic 98 species were identified during the evening – remarkable after very poor moth numbers during the first 6 months of this year.

These included lots of pretty species such as Ghost moth, Peach Blossom, Large Emerald (below), Poplar and Elephant Hawk-moths, Buff-tip and the stunning Garden Tiger.

Large Emerald (Chris Manley)

Large Emerald (Chris Manley)

The full species list for the event is here (in pdf format) Marsland moth records 13 July 2013

Small Eggar caterpillars

Small Eggar is a scarcely seen moth in Devon. The adult moths fly in late winter, a time of year when moth recorders tend not to be out and about. However, the colourful caterpillars live in groups and construct a characteristic silken ‘tent’ in hedgerows in spring and summer, and are more easily recorded. Nevertheless, we rarely receive more than a couple of records of this species each year.

Last weekend, David and Sue Mentz spotted a Small Eggar nest and caterpillars about 2m up in a hedge near Ide, on the outskirts of Exeter. One of their images is shown below.

If you spot Small Eggar caterpillars, please let us know, but be aware that there are other moth caterpillars that live in silken nests (e.g. Lackey), so photographs of the caterpillars would be very useful to confirm your sighting.

Small Eggar caterpillar (David & Sue Mentz)

Small Eggar caterpillar (David & Sue Mentz)

New Year moths

Happy New Year! And what a start it has been – dry days and mild nights have made for favourable conditions for moths, butterflies and other wildlife. Let’s hope the weather has made a New Year’s resolution and the seemingly endless rain that blighted 2012 is at an end.

Moths keep going right through the winter here in Devon and after Winter Moths and December Moths last month, January is bringing some new species out. Brindled Beauties, Spring Ushers and Dark Chestnuts are on the wing, in small numbers at least, and the first Epiphyas postvittana of the year have already started to appear in garden traps.

What’s more, with warm air coming from the south for the past few days (and nights!), there are migrant moths arriving. Seems amazing for the beginning of January, but immigrants such as Dark Swordgrass, Nomophila noctuella and Painted Lady butterfly have been recorded in southern England in recent days.

Well worth dusting off the moth-trap if you’d put it away for the winter, and please let us know about any recent moth sightings in the comments field below.